Often, these days, faith & credulity are considered synonyms, but they are not.  One example of this misunderstanding is in the interpretation of a passage in the Kalama Sutta.  This teaching by Buddha was brought to the fore, by Theosophists.  In the third volume of the SD (if memory serves) a rendering of the section 4 below quoted was given.  That section alone could give one the notion that faith in spiritual authorities or sages or sacred texts are not only not needed, but corrupting of the search for truth.  One only needs a thoughtful inquiry by oneself.  But the full sutta and the context of Buddha's many other teachings clarifies this wrong notion.

The Kalama Sutta is not as anti-authority as many would like. But if one ignores a few lines here and there it can appear that way.
First, the non-Buddhist Kalamas approach Buddha for advice. If He really intended to foster their total self-reliance He would have sent them away with "Don't ask me, go within yourselves." But He did not do so.

4. "It is proper for you, Kalamas, to doubt, to be uncertain; uncertainty has arisen in you about what is doubtful. Come, Kalamas. Do not go upon what has been acquired by repeated hearing; nor upon tradition; nor upon rumor; nor upon what is in a scripture; nor upon surmise; nor upon an axiom; nor upon specious reasoning; nor upon a bias towards a notion that has been pondered over; nor upon another's seeming ability; nor upon the consideration, 'The monk is our teacher.' "

At this point comes the blurring of the teaching. Actually Buddha suggested three criteria for rejecting (or accepting) a teaching.

"Kalamas, when you yourselves know:

1) 'These things are bad; these things are blamable;

2) these things are censured by the wise;

3) undertaken and observed, these things lead to harm and ill,' abandon them."

Number 1 says when you know for yourself that something is bad -- drop it.
Number 3 says when you know for yourself that something will eventually lead to badness -- drop it.

However, number 2 says take into account what wise authorities say. Can this be? Pay attention to someone other than ME? Evidently Buddha thought total self-reliance was not a good idea.

Later on the sutta gives the 3 criteria that should be applied to accepting a teaching. He repeats the same threefold advice, including paying attention to whether wise authorities praise something. If they do, then follow their example.

One can study a couple of translations and a commentary by Bhikku Bodhi at the Access to Insight webpage.

Considering the volumes of Buddhist works praising faith in Buddha, His teachings & his disciples in the Sangha as spiritual authorities and requiring their guidance for the aspirant, it is ridiculous to keep harping on this one out-of-context misquote as an authority (what an irony, eh?) for ignoring all but ones own views.