My Deeds Are Of No Importance

A man must be meek and humble in his conduct and in all his actions. Now you may ask, "Shouldn't I be modest and humble also in my service of G-d? Shouldn't I consider my prayer and good deeds as irrelevant and of negligible importance?" G-d forbid; don't entertain such thoughts! You should say to yourself, "The mitzvos that I perform are valued very highly by G-d. G-d takes immense delight in my good deeds." If you would be humble to fulfilling your religious duties, if you would say, "G-d is so great that my insignificant deeds are of no importance to Him," you would be committing a grave error; in fact, you would be denying G-d's greatness.

(Rebbe Levi Yitzchak of Berditchev)