33 These things the Saviour endured, and made peace through the Blood of His Cross, for things in heaven, and things in earth. For we were enemies of God through sin, and God had appointed the sinner to die. There must needs therefore have happened one of two things; either that God, in His truth, should destroy all men, or that in His loving-kindness He should cancel the sentence. But behold the wisdom of God; He preserved both the truth of His sentence, and the exercise of His loving-kindness.
Christ took our sins in His body on the tree, that we by His death might die to sin, and live unto righteousness. Of no small account was He who died for us; He was not a literal sheep; He was not a mere man; He was more than an Angel; He was God made man. The transgression of sinners was not so great as the righteousness of Him who died for them; the sin which we committed was not so great as the righteousness which He wrought who laid down His life for us—who laid it down when He pleased, and took it again when He pleased.
And would you know that He laid not down His life by violence, nor yielded up the ghost against His will? He cried to the Father, saying, Father, into Your hands I commend My spirit; I commend it, that I may take it again. And having said these things, He gave up the ghost; but not for any long time, for He quickly rose again from the dead.
Source: Catechetical Lectures (New Advent)