Luke 13:24
Strive to enter in by the narrow gate; for many, I tell you, shall seek to enter in, and shall not be able.
Matthew 7:13-14
Enter in through the narrow gate, for wide is the gate; and spacious the way which leads to destruction, and many are they that enter in by it;
Matthew 11:12
And from the days of John the Baptist till now the kingdom of heaven suffers violence, and the violent take it by force.
Mark 6:18-20
For John said to Herod, It is not lawful for you to have your brother's wife.
Luke 21:36
But watch continually, praying that you may be accounted worthy to escape all these things which are about to occur, and to stand before the Son of man.
John 6:27
Work not for the food which perishes, but for the food which endures to eternal life, which the Son of man will give you; for him has God the Father sealed.
John 7:34
You shall seek and shall not find, and where I am you cannot come.
John 8:21
Then Jesus said to them again, I go away, and you shall seek me and die in your sin; where I go, you cannot come.
John 13:33
My little children, I am with you yet a little while. You shall seek me, and as I said to the Jews, Where I go you cannot come, I now also say to you.
Romans 9:31-33
but Israel who pursued the law of righteousness did not attain to the law of righteousness.
Romans 10:3
for not knowing God's righteousness, and seeking to set up their righteousness, they have not submitted themselves to God's righteousness.
1 Corinthians 9:24-27
Know you not that those who run in the race all indeed run, but one takes the prize. So run that you may obtain.
Philippians 2:12-13
And so, my beloved, as you always obeyed, not in my presence only, but now much more in my absence, work out your salvation with fear and trembling;
Colossians 1:29
for which I also labor, striving with his power which operates in me with power.
Hebrews 4:11
Let us use diligence, therefore to enter into that rest [the heavenly rest], that no one may fall, after the same example of disobedience.
2 Peter 1:10
Wherefore, brothers, use the greater diligence to make your calling and election sure; for doing these things you shall never fall.