..whatever you do, whatever the process you use, and even if you happen to have acquired in it a great skill and power, you must leave the result in the hands of the Divine. Always you may try, but it is for the Divine to give you the fruit of your effort or not to give it. There your personal power stops; if the result comes, it is the Divine Power and not yours that brings it.
You question if it is right to ask the Divine for these things. But there is no more harm in turning to the Divine for the removal of a physical imperfection than in praying for the removal of a moral defect. But whatever you ask for or whatever your effort, you must feel, even while trying your best, using knowledge or putting forth power, that the result depends upon the Divine Grace.
Once you have taken up the Yoga, whatever you do must be done in a spirit of complete surrender. This must be your attitude,—“I aspire, I try to cure my imperfections, I do my best, but for the result I put myself entirely into the hands of the Divine.”
Ref: Questions and Answers 1929 – 1931