Take heed to carefully consider the words of every soul, then hold fast to the proofs which attest the truth. If ye fail to discover truth in a person's words, make them not the object of contention, inasmuch as ye have been forbidden in the Bayán to enter into idle disputation and controversy, that perchance on the Day of Resurrection ye may not engage in argumentation, and dispute with Him Whom God shall make manifest.

XVII, 16 - The Kitáb-I-Asmá