One day ‘Abdu’l-Bahá was asked how one should live. His reply was, 'Be kind to everyone.' One must not 'belittle the thought of another'. This kindness must reach out even to those who may suffer mental illness, as the Master so beautifully demonstrated when Mirza Aqa Jan, who had been the amaneunsis of Bahá-u-llah, became very disturbed. In spite of the troubles that this ill man caused, the Master did not want him banished to Yemen as the mayor of 'Akka suggested.
To Juliet Thompson the Master said, 'Never let anyone speak of another unkindly in your presence. Should anyone do so, stop them. Tell them it is against the commands of Bahá’u’lláh, that He has commanded: "Love one another." Never speak an unkind word, yourself, against anyone. If you see something wrong, let your silence be your only comment...'