Luke 21:34

"But pay attention to yourselves so that your hearts do not become overburdened by carousing, and drunkenness, and the worries of life. [If you do], that 'day' [i.e., Jesus' second coming and judgment] will arrive suddenly, like a trap [i.e., which catches an animal by surprise].

Mark 4:19

but worry [over things] of the world, and the deceitfulness of material wealth, and the evil desires for other things entered their hearts and choked [the effectiveness of] 'the word,' so that it did not yield a crop [in their lives].

Matthew 13:22

And the person who was sown among the thorns is the one who hears the message, but the anxieties of the world [i.e., of life] and the deceptiveness of [material] riches choke the message and he becomes unproductive.

Luke 12:40

So, you also should be ready, for the Son of man will return at a time when you least expect Him."

Luke 12:45-46

But if that slave should think to himself, 'My master will not be back soon,' and then becomes physically abusive to his men and women servants, and eats and drinks and gets drunk,

1 Corinthians 5:11

But I wrote to you not to associate with anyone claiming to be a [Christian] brother who is [guilty of being] sexually immoral, or greedy, or an idolater, or who speaks abusively, or a drunkard, or a swindler. Do not even eat [a social meal] with such a person.

1 Corinthians 6:10

And neither will thieves, nor greedy people, nor drunkards, nor abusive talkers, nor swindlers possess God's kingdom.

Matthew 24:39-50

And the people [i.e., of Noah's day] did not know [when it would happen] until the Flood came and swept them all away. It will be the same way when the presence of the Son of man [arrives].

Mark 13:9

"But pay attention to yourselves, for people will turn you over to [Jewish] councils [i.e., for judgment] and you will be beaten in synagogues. You will stand trial before governors and kings for being loyal to me. [This will afford you an opportunity] for witnessing to them.

Mark 13:35-37

So, be alert, because you do not know when the owner of the house will return, whether [some] evening, at midnight, at dawn, or at [mid-] morning.

Luke 8:14

And those people [represented by the seed] that fell among thorns are the ones who have heard [the word], and as they go about their business, they become choked by worry, by money and by worldly pleasures, and produce no mature crop.

Luke 10:41

But the Lord answered her, "Martha, Martha, you are worried and bothered about [so] many things.

Luke 17:3

Pay attention to yourselves! "If your brother sins, rebuke him [i.e., show him where he is wrong in hope of effecting a change]; and if he repents [i.e., changes his heart and life], forgive him.

Luke 21:8

And He replied, "Pay attention, so that you are not led astray [from the truth]. For many [false teachers] will come, claiming to be me, and saying, 'I am [the Christ],' and 'The time is near.' [But] do not go after them.

Romans 13:11-13

Now this [is another reason for observing the law of love]: You should know that it is about time to wake up out of your [spiritual] sleep, because [the day of our final] salvation is now nearer to us than when we first believed [in Christ].

Galatians 5:20

idol worship, occultic practices, hatefulness, dissension, jealousy, angry outbursts, factious spirits, divisiveness, party spirits,

Philippians 4:6

Do not worry about anything, but in everything, by prayer and [special] petition, along with thanksgivings, you should make your requests known to God.

1 Thessalonians 5:2-8

for you know perfectly well that the day of the Lord [i.e., when He returns, See II Thess. 2:1-2] will arrive like a thief coming in the night.

Hebrews 12:15

Look carefully [at how you are living] so that no one falls away from God's unearned favor, and that no "poisonous plant sprouts up" to cause trouble and corrupt many people [Note: This is an analogy from Deut. 29:16-18 being used as a warning against the evil influence of wicked people],

1 Peter 4:3-7

For the time you have [already] spent in the past [i.e., as Gentile unbelievers] was long enough to have practiced unrestrained, indecent conduct, improper sexual cravings, riotous living, wild parties, drunken orgies and disgusting idol worship.

2 Peter 3:10

But the day of the Lord will come as a thief [i.e., unexpectedly]. At that time the heavens will pass away with a loud noise and the elements [Note: This refers either to the heavenly bodies or to the material components of the universe], will be dissolved with intense heat. And the earth and its works [i.e., its activities] will be burned up. [Note: Some translations render this phrase as it is in some ancient manuscripts, "will be disclosed," or "will be laid bare"].

2 Peter 3:14

So, my dearly loved ones, while you are waiting for these things [to happen], do your best to be found at peace with God, pure and blameless in His sight.

Revelation 3:3

So, remember how you have received and heard the message [i.e., they had eagerly accepted the Gospel]; [now] obey it and repent. For if you do not become [spiritually] alert, I will come as a thief [i.e. unexpectedly] and you will not know the [exact] time that I will come upon you [in judgment. See 2:16, 25].

Treasury of Scripture Knowledge

Summary

And take heed to yourselves, lest at any time your hearts be overcharged with surfeiting, and drunkenness, and cares of this life, and so that day come upon you unawares.

Bible References

Your hearts

Luke 12:45
But if that slave should think to himself, 'My master will not be back soon,' and then becomes physically abusive to his men and women servants, and eats and drinks and gets drunk,
Romans 13:11
Now this [is another reason for observing the law of love]: You should know that it is about time to wake up out of your [spiritual] sleep, because [the day of our final] salvation is now nearer to us than when we first believed [in Christ].
1 Thessalonians 5:6
So then, we should not be [spiritually] asleep, like the rest [i.e., the unsaved world], but we should be alert and sober [i.e., in control of our senses].
1 Peter 4:3
For the time you have [already] spent in the past [i.e., as Gentile unbelievers] was long enough to have practiced unrestrained, indecent conduct, improper sexual cravings, riotous living, wild parties, drunken orgies and disgusting idol worship.

Surfeiting

1 Corinthians 5:11
But I wrote to you not to associate with anyone claiming to be a [Christian] brother who is [guilty of being] sexually immoral, or greedy, or an idolater, or who speaks abusively, or a drunkard, or a swindler. Do not even eat [a social meal] with such a person.
1 Corinthians 6:10
And neither will thieves, nor greedy people, nor drunkards, nor abusive talkers, nor swindlers possess God's kingdom.
Galatians 5:20
idol worship, occultic practices, hatefulness, dissension, jealousy, angry outbursts, factious spirits, divisiveness, party spirits,

Cares

Luke 8:14
And those people [represented by the seed] that fell among thorns are the ones who have heard [the word], and as they go about their business, they become choked by worry, by money and by worldly pleasures, and produce no mature crop.
Luke 10:41
But the Lord answered her, "Martha, Martha, you are worried and bothered about [so] many things.
Matthew 13:22
And the person who was sown among the thorns is the one who hears the message, but the anxieties of the world [i.e., of life] and the deceptiveness of [material] riches choke the message and he becomes unproductive.
Mark 4:19
but worry [over things] of the world, and the deceitfulness of material wealth, and the evil desires for other things entered their hearts and choked [the effectiveness of] 'the word,' so that it did not yield a crop [in their lives].
Philippians 4:6
Do not worry about anything, but in everything, by prayer and [special] petition, along with thanksgivings, you should make your requests known to God.

That day

Luke 12:46
that slave's master will return on a day that he least expects, and at an hour unknown [to him]. And [that master] will whip him to shreds and will turn him over to suffer the same fate as unfaithful servants receive.
Matthew 24:39
And the people [i.e., of Noah's day] did not know [when it would happen] until the Flood came and swept them all away. It will be the same way when the presence of the Son of man [arrives].
Mark 13:35
So, be alert, because you do not know when the owner of the house will return, whether [some] evening, at midnight, at dawn, or at [mid-] morning.
1 Thessalonians 5:2
for you know perfectly well that the day of the Lord [i.e., when He returns, See II Thess. 2:1-2] will arrive like a thief coming in the night.
2 Peter 3:10
But the day of the Lord will come as a thief [i.e., unexpectedly]. At that time the heavens will pass away with a loud noise and the elements [Note: This refers either to the heavenly bodies or to the material components of the universe], will be dissolved with intense heat. And the earth and its works [i.e., its activities] will be burned up. [Note: Some translations render this phrase as it is in some ancient manuscripts, "will be disclosed," or "will be laid bare"].
Revelation 3:3
So, remember how you have received and heard the message [i.e., they had eagerly accepted the Gospel]; [now] obey it and repent. For if you do not become [spiritually] alert, I will come as a thief [i.e. unexpectedly] and you will not know the [exact] time that I will come upon you [in judgment. See 2:16, 25].

General references

Mark 4:7
And other seeds fell among thorns which grew up and choked them so that they yielded no crop.
Mark 13:33
"You should pay attention; be alert and pray, for you do not know when the time will come [i.e., for the Lord to return].
Luke 12:40
So, you also should be ready, for the Son of man will return at a time when you least expect Him."
Luke 17:30
"It will be the same way on the day the Son of man is revealed [i.e., at His second coming].