Need for gradualism and mildness

Carefully deliver words at appropriate time and place, speaking primarily with mild words and leniently so words may have their effect

"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. And likewise He saith: One word is like unto springtime causing the tender saplings of the rose-garden of knowledge to become verdant and flourishing, while another word is even as a deadly poison. It behoveth a prudent man of wisdom to speak with utmost leniency and forbearance so that the sweetness of his words may induce everyone to attain that which befitteth man's station."

(Bahá'u'lláh, Tablets of Bahá'u'lláh, p. 172)