It is very rare to get full faith in One [God or Guru]. If such a faith blossoms in the heart [due to past merits], do protect and nourish it, since it is similar to a new-born baby, without spoiling it by giving room to any doubts or suspicion, just as, if one possessed the Kamadenu, one would bring it up with great care and love.
[Michael James: The Kamadenu is a divine cow which will give one whatever one desires. Likewise, complete faith in God or Guru will bestow anything and everything upon a devotee. Such is the wonderful power of faith.]