“we should not belittle anyone and call him ignorant”

In accordance with the divine teachings in this glorious dispensation we should not belittle anyone and call him ignorant, saying: 'You know not, but I know'. Rather, we should look upon others with respect, and when attempting to explain and demonstrate, we should speak as if we are investigating the truth, saying: 'Here these things are before us. Let us investigate to determine where and in what form the truth can be found.' The teacher should not consider himself as learned and others ignorant. Such a thought breedeth pride, and pride is not conducive to influence. The teacher should not see in himself any superiority; he should speak with the utmost kindliness, lowliness and humility, for such speech exerteth influence and educateth the souls. (‘Abdu'l-Baha, 'Selections from the Writings of ‘Abdu'l-Baha')