We shouldn’t content with any one

Beware lest ye contend with any one, nay, strive to make him aware of the truth with kindly manner and most convincing exhortation. If your hearer respond, he will have responded to his own behoof, and if not, turn ye away from him, and set your faces towards God's sacred Court, the seat of resplendent holiness. (Baha'u'llah, Gleanings from the Writings of Baha'u'llah; Compilation of Compilations, vol. 3)