Selections from the Writings of 'Abdu'l-Baha / Abdulbahanin Yazilarindan Secmeler (Turkish, PDF) Abdu'l-Bahá expounded the teachings of Bahá'u'lláh and the need for human unity and universal peace through speeches delivered in universities, churches, synagogues, and the meeting halls of various institutions. This work contains compilations of portions of these speeches. In Turkish.