Bahá’í Sacred Writings, ‘Abdu’l-Bahá, #334

O thou seeker after the Kingdom of God! If thou wishest thy speech and utterance to penetrate hearts that are hardened, rid thyself of all attachment to the world and turn thy face unto the Kingdom of God. Kindle the fire of His love within thy heart in such wise that thou mayest become a burning flame and a luminous candle of guidance. Then will thy speech, through the confirmation of the Holy Spirit, stir every heart.