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-BaháAnd now one of the greatest and most fundamental principles of the Cause of God is to shun and avoid entirely the Covenant-breakers, for they will utterly destroy the Cause of God, exterminate His Law and render of no account all efforts exerted in the past.
Abdu'l-BaháThis perfected body can be compared to a mirror, and the human spirit to the sun. Nevertheless, if the mirror breaks, the bounty of the sun continues; and if the mirror is destroyed or ceases to exist, no harm will happen to the bounty of the sun, which is everlasting. This spirit has the power of discovery; it encompasses all things.
Abdu'l-BaháLove gives life to the lifeless. Love lights a flame in the heart that is cold. Love brings hope to the hopeless and gladdens the hearts of the sorrowful. In the world of existence there is indeed no greater power than the power of love
Abdu'l-BaháBe not the slave of your moods, but their master. But if you are so angry, so depressed and so sore that your spirit cannot find deliverance and peace even in prayer, then quickly go and give some pleasure to someone lowly or sorrowful, or to a guilty or innocent sufferer! Sacrifice yourself, your talent, your time, your rest to another, to one who has to bear a heavier load than you - and your unhappy mood will dissolve into a blessed, contented submission to God.
Abdu'l-Bahá