Man must cut himself free from all prejudice so that he may search after truth unhindered.
'Abdu'l-Baha says:-- In order to find truth we must give up our prejudices, our own small trivial notions; an open receptive mind is essential.

If our chalice is full of self, there is no room in it for the water of life.

The fact that we imagine ourselves to be right and everybody else wrong is the greatest of all obstacles in the path towards unity, and unity is essential if we would reach Truth, for Truth is one....
No one truth can contradict another truth.

Light is good in whatsoever lamp it is burning! A rose is beautiful in whatsoever garden it may bloom! A star has the same radiance if it shines from the East or from the West! Be free from prejudice; so will you love the Sun of Truth from whatever point in the horizon it may arise.

You will realize that if the Divine Light of Truth shone in Jesus Christ, it also shone in Moses and Buddha.