Holy souls are like soil which has been plowed and tilled with much earnest labor, the thorns and thistles cast aside and all weeds uprooted. Such soil is most fruitful, and the harvest from it will prove full and plenteous. In this same way man must free himself from the weeds of ignorance, thorns of superstitions and thistles of imitations that he may discover reality in the harvests of true knowledge. Otherwise, the discovery of reality is impossible, contention and divergence of religious belief will always remain, and mankind, like ferocious wolves, will rage and attack each other in hatred and antagonism.
—‘Abdu’l-Bahá, The Promulgation of Universal Peace
