In Order to Do the Mitzvah

When a person davens to Hashem for his livelihood, to have children, and other such things, he should ask for these things not for himself but in order to carry out the mitzvos of Hashem, like a servant who is asking his Master for the privilege to serve Him, knowing that he has no one to turn to but his Master Himself.

(Shaar Hamitzvos by Reb Chaim Vital, Introduction)