Benefits of Truth
Patanjali Yoga Sutra
II.36. SATYA-PRATISTHAYAM KRIYA-PHALASRAYATVAM.
By the establishment of truthfulness the Yogi gets the power of attaining for himself and others the fruits of work without the works.
When this power of truth will be established with you, then even in dream you will never tell an untruth. You will be true in thought, word, and deed. Whatever you say will be truth. You may say to a man, "Be blessed," and that man will be blessed. If a man is diseased, and you say to him, "Be thou cured," he will be cured immediately.
Commentary by Swami Vivekananda