Of course most of the "truths" won't bear much resemblance to what you'd get if you only used the scientific method.

Also most of these truths will eventually wind up putting you in a position where you start experiencing pain or even dying despite your "truth" telling you that you aren't.

Or as Chesterton put it:

If a man proves too clearly and convincingly to himself . . . that a tiger is an optical illusion--well, he will find out he is wrong. The tiger will himself intervene in the discussion, in a manner which will be in every sense conclusive.