C.J. Mahaney has some stirring words in the video below about Jesus in the Garden of Gethsemane.
And they went to a place called Gethsemane. And he said to his disciples, “Sit here while I pray.” And he took with him Peter and James and John, and began to be greatly distressed and troubled. And he said to them, “My soul is very sorrowful, even to death. Remain here and watch.” And going a little farther, he fell on the ground and prayed that, if it were possible, the hour might pass from him. And he said, “Abba, Father, all things are possible for you. Remove this cup from me. Yet not what I will, but what you will.” (Mark 14:32-36)
If you’d like to know more about the “Why?” behind Jesus and his suffering on the cross, might I highly recommend The Big Picture of the Bible by Ken Craig? It’s a fantastic summary, in just 48 pages, of God’s eternal plan, Jesus as the “Lamb of God,” and what we must do to receive the forgiveness of our sins.