Mt 27:40 "...save Yourself! If You are the Son of God, come down from the cross."
He did not save Himself in order to save sinners. He did not spare Himself so we could be spared. Instead of coming down from the cross for Himself He would come out of the grave for us.
Learn a humbling spiritual fact about ourselves here. We could never save ourselves. The fact that the Lord Jesus did not spare Himself implies that we could never do it. His death is a must for the sinner's salvation.
My friend, don't attempt to save yourself. Accept the humble fact that you, as a sinner, can't do it. Instead, come to the One who could have saved Himself but chose to remain for your salvation.