Bahá’í World Faith—Selected Writings of Bahá’u’lláh and ‘Abdu’l-Bahá (‘Abdu’l-Bahá’s Section Only)

If thou seekest to be intoxicated with the cup of the Most Mighty Gift, cut thyself from the world and be quit of self and desire. Exert thyself night and day until spiritual powers may penetrate thy heart and soul. Abandon the body and the material, until the merciful powers may become manifest; because not until the soil is become pure will it develop through the heavenly bounty; not until the heart is purified, will the radiance of the Sun of Truth shine therein. I beg of God that thou wilt day by day increase the purity of thy heart, the cheerfulness of thy soul, the light of thy insight and the search for Truth.