In the account of the miraj it is said that a buraq was brought for Muhammed to ride, an animal like a horse with a human face. This buraq was the breath, the horse whose rein is in the rider's hand. If a person exercises the breath and practices concentration with a scientific idea only, he soon becomes tired. He thinks, "Why take so much trouble, for what result?" If it is done with the thought of God, with the repetition of the names of God, then a happiness comes, a bliss, by the thought of the idealized God, in Whom is all perfection, all beauty, the Friend to Whom we can tell our sorrows, all our sorrows, all our troubles. Sa'adi says that in the thought of God there is this blessing, that it draws us every moment nearer to Him. The practice of zikr makes you much warmer to all about you. The Fikr makes you able to send your thought to another and it gives long life. The more each breath is lengthened, the longer you will live. Some yogis, by this means, have lived three hundred or four hundred years. God bless you.