Faith

Questioner: Would you tell a Westerner to repeat "Om" or "Ram" or "Hare Krishna" ceaselessly, though he lacks completely the faith and conviction... Without confidence of fervor; repeating mechanically the same sounds, will he ever achieve anything?
Maharaj: Why not? It is the urge, the hidden motive that matters, not the shape it takes. Whatever he does, if he does it for the sake of finding his own real self, will surely bring him to himself.
Questioner: No need of faith in the efficacy of the means?
Maharaj: No need of faith which is but expectation of results. Here the action only counts. Whatever you do for the sake of truth, will take you to truth. Only be earnest and honest. The shape it takes hardly matters.
   — I Am That

Mustn't I have faith that doing whatever for the sake of truth will take me to truth?  Perhaps faith that some practice is right without expectation of some specific results - that makes sense to me. But, why would one undertake any action without some faith that it is the right thing to do and at least the expectation that whatever comes of it will be somehow good or appropriate?