If there was no Cross, there would be no Resurrection. If there was no Good Friday, there would be no Easter Sunday. We wouldn't even be here...there would be no Church, no Christianity. If Jesus had lived a long life and died a normal death (this is all hard to imagine), we would not have a savior. We would still be in our sin and the gates of Heaven would still be closed. We would have no hope of eternal life.
Thank God for the second part of Jesus' prayer: "not my will, but yours be done". The absolute necessity and primacy of Jesus' humility and obedience to the Father's Will...for us! The absolute necessity and primacy of humility and obedience to God's Will in our own lives!
When we come to the Eucharist at every Mass, we say, "thank you, Jesus". Thank you for your sacrifice. Thank you for your humility in saying, "not my will, but yours be done".