A Bahá’í has the advantage of the Divine Revelation for this Age, which shines like a searchlight on so many problems that baffle modern thinkers; he must therefore develop the ability to learn everything from those around him, showing proper humility before his teachers, but always relating what he hears to the Bahá’í teachings, for they will enable him to sort out the gold from the dross of human error.

Universal House of Justice, Lights of Guidance, p. 214

The emphatic and vigorous language of ‘Abdu’l-Bahá's Will and Testament is at this time of His own passing, the safeguard of the Cause: “Unto the Most Holy Book every one must turn and all that is not expressly recorded therein must be referred to the Universal House of Justice. That which this body, whether unanimously or by majority doth carry, that is verily the Truth and the Purpose of God Himself. Whoso doth deviate therefrom is verily of them that love discord, hath shown forth malice, and turned away from the Lord of the Covenant." And again: "All must seek guidance and turn unto the Centre of the Cause and the House of Justice. And he that turneth unto whosoever else is indeed in grievous error.

Universal House of Justice, Lights of Guidance, p. 317-318