Every word is endowed with a spirit, therefore the speaker or expounder should carefully deliver his words at the appropriate time and place, for the impression which each word maketh is clearly evident and perceptible. The Great Being saith: One word may be likened unto fire, another unto light, and the influence which both exert is manifest in the world. Therefore an enlightened man of wisdom should primarily speak with words as mild as milk, that the children of men may be nurtured and edified thereby and may attain the ultimate goal of human existence which is the station of true understanding and nobility. Bahá’u’lláh, Tablets of Bahá’u’lláh Revealed After the Kitáb-i-Aqdas. Available from https://reference.bahai.org/en/t/b/TB/tb-12.html#pg172