Every kind of knowledge, every science, is as a tree: if the fruit of it be the love of God, then is it a blessed tree, but if not, that tree is but dried-up wood, and shall only feed the fire
Abdu'l-BaháTruthfulness is the foundation of all virtues of the world of humanity. Without truthfulness, progress and success in all the worlds of God are impossible for a soul. When this holy attribute is established in man, all the divine qualities will also become realized.
Abdu'l-BaháThe pure heart is one that is entirely cut away from self. To be selfless is to be pure.
Abdu'l-Bahá