For God so loved the world, that he gave his one and only Son, that whoever believes in him should not perish, but have eternal life.
His only-begotten Son - See the notes at John 1:14. This is the highest expression of love of which we can conceive. A parent who should give up his only son to die for others who are guilty if this could or might be done - would show higher love than could be manifested in any other way. So it shows the depth of the love of God, that he was willing. to give his only Son into the hands of sinful men that he might be slain, and thus redeem them from eternal sorrow.