Yet it pleased ther Lord to bruise him; he has put him to grief: when you shall make his soul an offering for sin, he shall see [his] seed, he shall prolong his days, and the pleasure of the Lord shall prosper in his hand. — Isaiah 53:10
The next day, he saw Jesus coming to him, and said, "Behold, the Lamb of God, who takes away the sin of the world!" — John 1:29

Author
Charles Spurgeon
Summary: Jesus did not die in vain: he died as our substitute, bearing the punishment for our sins. God accepted his sacrifice and thus saved those for whom he gave his life. Like a grain of wheat that bears fruit, his death brings forth a family of believers in whom his life continues and is represented. Jesus sees in us the fruit of his soul’s labor, recognizes us, and delights in us. Let us rejoice that he will never cease to behold the harvest of his atonement: the eyes that wept for us now look upon us with pleasure as we look to him.
Our Lord Jesus did not die in vain. His death was an atonement: He died as our substitute, because death was the punishment for our sins; and because God accepted His substitution, He has saved those for whom He laid down His life as a sacrifice.
Through death He became like the grain of wheat that bears much fruit. Jesus must have offspring; He is “the everlasting Father.” He will say, “I and the children whom Jehovah has given me.” A man is honored in his children, and Jesus has His quiver full of these arrows of the mighty. A man is represented in his children, and so Christ is represented in Christians. A man’s life seems to be prolonged and extended in his offspring; and so the life of Jesus continues in believers.
Jesus lives, for He sees His offspring. He fixes His eyes on us, delights in us, and recognizes us as the fruit of the labor of His soul. We should rejoice because our Lord never ceases to enjoy the result of His terrible atonement, and because He will never cease to delight His eyes in the harvest of His death. Those eyes that once wept for us now look upon us with pleasure. Yes, He looks at those who look at Him. Our eyes meet! What great joy this is!
Source: The Checkbook of the Bank of Faith. Translation by Allan Roman.
http://www.spurgeon.com.mx/chequera/meditames/enero.pdf