Souls have appeared in the world who were pure and undefiled, who have directed their attention toward God, seeking the reward of God, attaining nearness to the threshold of God, acceptable in the good pleasure of God. They have been the lights of guidance and stars of the Supreme Concourse. Consider these souls, shining like stars in the horizon of sanctity forevermore.
(‘Abdu’l-Bahá, The Promulgation of Universal Peace, p. 186)
The spiritual love of God maketh man pure and holy and clotheth him with the garment of virtue and purity. And when man attacheth his heart wholly to God and becometh related to the Blessed Perfection, the divine bounty will dawn. This love is not physical, nay, rather, it is absolutely spiritual.
(‘Abdu’l-Bahá, Bahá’í World Faith, p. 365)
Verily pure hearts are as clear and brilliant mirrors which imprint the one on the other, and hearts discover the secrets of hearts. Therefore, they (hearts) chant the verses of longing and recite the odes of glorification and praise. Consequently, the recourse is to pages of hearts, not pages filled with written lines.
(‘Abdu’l-Bahá, Tablets of ‘Abdu’l-Bahá v1, p. 120)
When asked for a definition of a pure heart, ‘Abdu’l-Bahá said, “The pure heart is one that is entirely cut away from self. To be selfless is to be pure.
(‘Abdu’l-Bahá, ‘Abdu’l-Bahá in London, p. 106)