Check out this question on Yahoo answers:
Baha'i Faith and the Principle of contradiction?
quote from official Baha'i website "The fundamental principle enunciated by Bahá'u'lláh, the followers of His Faith firmly believe, is that religious truth is not absolute but relative." http://info.bahai.org/article-1-4-0-4.ht…
So essentially what is true for you may not be true for me. Does that make any sense? If I believe X and you believe not X, both of us can't be right. It violates the laws of Logic. http://en.wikipedia.org/wiki/Principle_of_contradiction
so if you accept relativism aren't you being illogical?
My answer would be that this summary of the principle of progressive revelation by the Guardian packs a lot into a few words, and would be incomprehensible if you do not already understand the concept well, that is, if you have not read the Iqan. Prima Facie, it makes no sense, it contradicts itself. You would have to expand the sentence fragment quite a lot to know what is meant, for example, by adding "relative to the age in which the truth was revealed..." or something like that. Of course religious truth has to be absolute in some sense, or there would be nothing to be relative to.
In any case, the answers already posted there seem inadequate, so perhaps some of my learned readers here would like to go to the site and comment...