Romans 5:15

But the free gift [of salvation through Christ] is not [exactly] like the sin [of Adam]. For if many people died [physically] because of the sin of the one man [i.e., Adam], how much more did God's favor abound by [providing] His gracious gift [of salvation] to many people because of the one man, Jesus Christ.

Romans 5:12

Therefore, just as sin came into the world through [the action of] one man [i.e., Adam] and [physical] death through that sin, so [physical] death has spread to all people, because all people have sinned. [Note: This difficult passage (verses 12-21) seems to be saying that the entire human race must experience physical death because of Adam's sin (I Cor. 5:22), which is somehow considered to be everyone's sin. See Murray, pp. 180-187, for a thorough discussion].

Romans 5:16-20

And the gift [of salvation] is not like [the effect of] one man's sin [i.e., Adam's], for [God's] judgment of condemnation came [upon mankind] through one man [i.e., Adam], but the free gift [of salvation] came as the result of [the] many sins [of mankind] and [it] made people right with God.

Romans 6:23

For the wages for sinning is [spiritual] death, but God's free gift is never ending life in [fellowship with] Christ Jesus our Lord.

Ephesians 2:8

For you have been saved by God's unearned favor, through [your] faith, and that [salvation] was not the result of your own doing; it was the gift from God.

1 John 5:11

And this is the testimony [of God]: He gave to us [the hope of] never ending life, and this life is [available through fellowship] in His Son.

Matthew 20:28

Even so, the Son of man did not come to be served [by others] but to be the servant [of others], and to sacrifice His life as a ransom price to purchase many people [i.e., back from Satan]."

Matthew 26:28

for this is [i.e., represents] my blood of the Agreement [i.e., between God and mankind], which is [to be] poured out for many people in order for [their] sins to be forgiven.

John 3:16

For God loved the world [of sinners] so much that He gave His one and only Son, so that every person who believes in Him would not [have to] be destroyed, but have never ending life.

John 4:10

Jesus answered her, "If you [only] knew the [real] gift of God, and who it is that said to you, '[Please], give me a drink,' you would have asked Him, and He would have given you living water."

Acts 15:11

For we believe that [both] we [Jews] and they [Gentiles] will be saved in the same way, through the unearned favor of the Lord Jesus."

2 Corinthians 9:15

I thank God for His indescribable gift [i.e., Christ. See Rom. 8:32].

Hebrews 2:9

But we do see Jesus, who was made a little bit lower than the angels [i.e., by suffering death as a human being], and was crowned with splendor and honor because He suffered death. It was by God's unearned favor that He would experience death for every person.

1 John 2:2

And He is the One who provides a "covering over" [or atonement] for our sins [See Heb. 2:17; Dan. 9:24; II Chron. 29:24], and not for ours [who are already Christians] only, but also for the sins of the people of the whole world.

1 John 4:9-10

Here is the way God's love for us was demonstrated; He sent His one and only Son into the world so that we could have [spiritual] life through Him.

Revelation 7:9-10

After seeing [all] these things, I looked and there [I saw] a huge crowd, which no one could count, from every nation, and tribe, and race, and language group standing in front of the throne [of God] and in front of the Lamb. They were dressed in white robes and had palm tree branches in their hands.

Revelation 7:14-17

And I answered him, "Sir, [surely] you know." And he said to me, "These are the people who have come through the terrible persecution, and they have washed their robes and made them white with the blood of the Lamb.

Treasury of Scripture Knowledge

Summary

But not as the offence, so also is the free gift. For if through the offence of one many be dead, much more the grace of God, and the gift by grace, which is by one man, Jesus Christ, hath abounded unto many.

Bible References

But not

Romans 5:16
And the gift [of salvation] is not like [the effect of] one man's sin [i.e., Adam's], for [God's] judgment of condemnation came [upon mankind] through one man [i.e., Adam], but the free gift [of salvation] came as the result of [the] many sins [of mankind] and [it] made people right with God.
John 3:16
For God loved the world [of sinners] so much that He gave His one and only Son, so that every person who believes in Him would not [have to] be destroyed, but have never ending life.
John 4:10
Jesus answered her, "If you [only] knew the [real] gift of God, and who it is that said to you, '[Please], give me a drink,' you would have asked Him, and He would have given you living water."

Many

Romans 5:12
Therefore, just as sin came into the world through [the action of] one man [i.e., Adam] and [physical] death through that sin, so [physical] death has spread to all people, because all people have sinned. [Note: This difficult passage (verses 12-21) seems to be saying that the entire human race must experience physical death because of Adam's sin (I Cor. 5:22), which is somehow considered to be everyone's sin. See Murray, pp. 180-187, for a thorough discussion].
Matthew 20:28
Even so, the Son of man did not come to be served [by others] but to be the servant [of others], and to sacrifice His life as a ransom price to purchase many people [i.e., back from Satan]."
Matthew 26:28
for this is [i.e., represents] my blood of the Agreement [i.e., between God and mankind], which is [to be] poured out for many people in order for [their] sins to be forgiven.

Much

Ephesians 2:8
For you have been saved by God's unearned favor, through [your] faith, and that [salvation] was not the result of your own doing; it was the gift from God.

And the gift

Romans 6:23
For the wages for sinning is [spiritual] death, but God's free gift is never ending life in [fellowship with] Christ Jesus our Lord.
2 Corinthians 9:15
I thank God for His indescribable gift [i.e., Christ. See Rom. 8:32].
Hebrews 2:9
But we do see Jesus, who was made a little bit lower than the angels [i.e., by suffering death as a human being], and was crowned with splendor and honor because He suffered death. It was by God's unearned favor that He would experience death for every person.
1 John 4:9
Here is the way God's love for us was demonstrated; He sent His one and only Son into the world so that we could have [spiritual] life through Him.
1 John 5:11
And this is the testimony [of God]: He gave to us [the hope of] never ending life, and this life is [available through fellowship] in His Son.

Hath

Romans 5:20
Now the law of Moses was introduced [into the world] in order to cause sin to increase [i.e., it defined many things to be wrong that were previously not regarded as sin]. But with the increase of sin, God's unearned favor increased all the more.
1 John 2:2
And He is the One who provides a "covering over" [or atonement] for our sins [See Heb. 2:17; Dan. 9:24; II Chron. 29:24], and not for ours [who are already Christians] only, but also for the sins of the people of the whole world.
Revelation 7:9
After seeing [all] these things, I looked and there [I saw] a huge crowd, which no one could count, from every nation, and tribe, and race, and language group standing in front of the throne [of God] and in front of the Lamb. They were dressed in white robes and had palm tree branches in their hands.