It seems to me that this is a particularly important and reassuring passage for us, since it shows that even Jesus could be frightened about the future and unhappy with a course that God the Father has mapped out to follow.
Here is the description of this event from each of the three Synoptic Gospels, with my italics added:
36 Then Jesus went with his disciples to a place called Gethsemane, and he said to them, “Sit here while I go over there and pray.” 37 He took Peter and the two sons of Zebedee along with him, and he began to be sorrowful and troubled.38 Then he said to them, “My soul is overwhelmed with sorrow to the point of death. Stay here and keep watch with me.”
39 Going a little farther, he fell with his face to the ground and prayed, “My Father, if it is possible, may this cup be taken from me. Yet not as I will, but as you will.”
40 Then he returned to his disciples and found them sleeping. “Couldn’t you men keep watch with me for one hour?” he asked Peter. 41 “Watch and pray so that you will not fall into temptation. The spirit is willing, but the flesh is weak.”
42 He went away a second time and prayed, “My Father, if it is not possible for this cup to be taken away unless I drink it, may your will be done.”
43 When he came back, he again found them sleeping, because their eyes were heavy. 44 So he left them and went away once more and prayed the third time, saying the same thing.
45 Then he returned to the disciples and said to them, “Are you still sleeping and resting? Look, the hour has come, and the Son of Man is delivered into the hands of sinners. 46 Rise! Let us go! Here comes my betrayer!”
32 They went to a place called Gethsemane, and Jesus said to his disciples, “Sit here while I pray.” 33 He took Peter, James and John along with him, and he began to be deeply distressed and troubled. 34 “My soul is overwhelmed with sorrow to the point of death,” he said to them. “Stay here and keep watch.”
35 Going a little farther, he fell to the ground and prayed that if possible the hour might pass from him. 36 “Abba, Father,” he said, “everything is possible for you. Take this cup from me. Yet not what I will, but what you will.”
37 Then he returned to his disciples and found them sleeping. “Simon,” he said to Peter, “are you asleep? Couldn’t you keep watch for one hour? 38 Watch and pray so that you will not fall into temptation. The spirit is willing, but the flesh is weak.”
39 Once more he went away and prayed the same thing. 40 When he came back, he again found them sleeping, because their eyes were heavy. They did not know what to say to him.
41 Returning the third time, he said to them, “Are you still sleeping and resting? Enough! The hour has come. Look, the Son of Man is delivered into the hands of sinners. 42 Rise! Let us go! Here comes my betrayer!”
39 Jesus went out as usual to the Mount of Olives, and his disciples followed him.40 On reaching the place, he said to them, “Pray that you will not fall into temptation.” 41 He withdrew about a stone’s throw beyond them, knelt down and prayed, 42 “Father, if you are willing, take this cup from me; yet not my will, but yours be done.” 43 An angel from heaven appeared to him and strengthened him.44 And being in anguish, he prayed more earnestly, and his sweat was like drops of blood falling to the ground.
45 When he rose from prayer and went back to the disciples, he found them asleep, exhausted from sorrow. 46 “Why are you sleeping?” he asked them. “Get up and pray so that you will not fall into temptation.”
I don’t think there can be any doubt that Jesus is afraid and unhappy about what He is supposed to do and what lies ahead. And He wants God to reconsider.
But: He makes clear in his prayer that He wants God’s will, not His own. And, poignantly, when the time comes and it is apparent that God has not changed His mind, Jesus does not hesitate: “Rise! Let us go! Here comes my betrayer!”
So, Christian, there’s no shame in being afraid and unhappy sometimes with what lies before us and even with what God asks. But at the end of the day we are to put God’s will ahead of our own and run toward the battle.