Luke 9:38-41 Suddenly a man from the multitude cried out, saying, “Teacher, I implore You, look on my son, for he is my only child. And behold, a spirit seizes him, and he suddenly cries out; it convulses him so that he foams at the mouth; and it departs from him with great difficulty, bruising him. So I implored Your disciples to cast it out, but they could not.” Then Jesus answered and said, “O faithless and perverse generation, how long shall I be with you and bear with you? Bring your son here.”
When you are serving, there are things that you can do, there are things only your mentor can do. It is not that you can’t do what he does but your faith has not risen to his level. Gehazi used Elisha’s staff but could not raise the dead boy.
2 Kings 4:31 Gehazi hurried on ahead and laid the staff on the child’s face, but nothing happened. There was no sign of life. He returned to meet Elisha and told him, “The child is still dead.”