Do not allow any discouragement to come upon you and have no distrust of the Divine Grace. Whatever difficulties are outside you, whatever weaknesses are inside you, if you keep firm hold on your faith and your aspiration, the secret Power will carry you through and bring you back here. Even if you are oppressed with opposition and difficulties, even if you stumble, even if the way seems closed to you, keep hold on your aspiration; if faith is clouded for a time, turn always in mind and heart to us and it will be removed. As for outer help in the way of letters we are perfectly ready to give it to you. But keep firm on the way—then in the end things open out of themselves and circumstances yield to the inner spirit.
Ref: Letters on Yoga – II