A parable relates the story of a man of the people, who came to one of the Tzadikim, crying bitterly:
"I have such awful pains, headaches, and worries. I can neither pray nor study. What will be the end of me?"
The Tzadik answered:
"You are greatly mistaken.
You think that God needs your prayers and your studies?
If He had any such need He would place a few thousand angels to pray and study for Him.
God needs your particular pains and your headache and your worries.
For this He cannot get angelic or human help.
Only you can supply it."
–Rabbi Adin Steinsaltz
From The Long Shorter Way by Rabbi Adin Steinsaltz