"All prejudices, whether of religion, race, politics or nation, must be renounced, for these prejudices have caused the world’s sickness."

"O COMPANION OF MY THRONE! Hear no evil, and see no evil, abase not thyself, neither sigh and weep. Speak no evil, that thou mayest not hear it spoken unto thee, and magnify not the faults of others that thine own faults may not appear great; and wish not the abasement of anyone, that thine own abasement be not exposed. Live then the days of thy life, that are less than a fleeting moment, with thy mind stainless, thy heart unsullied, thy thoughts pure, and thy nature sanctified, so that, free and content, thou mayest put away this mortal frame, and repair unto the mystic paradise and abide in the eternal kingdom for evermore."

- Bahá'u'lláh, The Hidden Words of Bahá’u’lláh, Persian No. 44

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THE FIFTH PRINCIPLE—THE ABOLITION OF PREJUDICES 
4 Avenue de Camöens, Paris,
November 13th, 1911

"All prejudices, whether of religion, race, politics or nation, must be renounced, for these prejudices have caused the world’s sickness. It is a grave malady which, unless arrested, is capable of causing the destruction of the whole human race. Every ruinous war, with its terrible bloodshed and misery, has been caused by one or other of these prejudices.

The deplorable wars going on in these days are caused by the fanatical religious hatred of one people for another, or the prejudices of race or colour.

Until all these barriers erected by prejudice are swept away, it is not possible for humanity to be at peace. For this reason Bahá’u’lláh has said, ‘These Prejudices are destructive to mankind’.

Contemplate first the prejudice of religion: consider the nations of so-called religious people; if they were truly worshippers of God they would obey His law which forbids them to kill one another.

If priests of religion really adored the God of love and served the Divine Light, they would teach their people to keep the chief Commandment, ‘To be in love and charity with all men’. But we find the contrary, for it is often the priests who encourage nations to fight. Religious hatred is ever the most cruel!

All religions teach that we should love one another; that we should seek out our own shortcomings before we presume to condemn the faults of others, that we must not consider ourselves superior to our neighbours! We must be careful not to exalt ourselves lest we be humiliated.

Who are we that we should judge? How shall we know who, in the sight of God, is the most upright man? God’s thoughts are not like our thoughts! How many men who have seemed saint-like to their friends have fallen into the greatest humiliation. Think of Judas Iscariot; he began well, but remember his end! On the other hand, Paul, the Apostle, was in his early life an enemy of Christ, whilst later he became His most faithful servant. How then can we flatter ourselves and despise others?

Let us therefore be humble, without prejudices,  preferring others’ good to our own! Let us never say, ‘I am a believer but he is an infidel’, ‘I am near to God, whilst he is an outcast’. We can never know what will be the final judgment! Therefore let us help all who are in need of any kind of assistance.

Let us teach the ignorant, and take care of the young child until he grows to maturity. When we find a person fallen into the depths of misery or sin we must be kind to him, take him by the hand, help him to regain his footing, his strength; we must guide him with love and tenderness, treat him as a friend not as an enemy.

We have no right to look upon any of our fellow-mortals as evil." ...

 `Abdu'l-Bahá, Paris Talks, pp. 146-148