ʻAbdu'l-Bahá,
Bahá'í World Faith
“ SPIRITUAL KNOWLEDGE If thou wishest the divine knowledge and recognition, purify thy heart from all beside God, be wholly attracted to the ideal, beloved One; search for and choose Him and apply thyself to rational and authoritative arguments. For arguments are a guide to the path and by this the heart will be turned unto the Sun of Truth. And when the heart is turned unto the Sun, then the eye will be opened and will recognize the Sun through the Sun itself. ”
