If jesus could perform such amazing miracles, why did he need help from Simon to carry his cross?

He turned water into wine (John 2:1-11), raised Jairus's daughter from the dead (Mark 5:21-43), raised Lararus from the dead (John 11:1-45), calmed the storm on the Sea of Galilee (Mark 4:35-41), and resored vision to a blind man (Mark 10:46-52)..................yet he struggled so pathetically to carry his cross that Simon of Cyrene was ordered to help him. How could a man capable of performing these miracles, and others, not be able to carry his cross on the tip of a finger?