Brahman is Sat or Existence-Absolute. Truth must be observed in thought, word and deed. If you are established in truth, all other virtues will cling to you by themselves. Harischandra sacrificed everything for the sake of truth. He lives still in our hearts. Yudhishthira was also devoted to truth. There is no virtue higher than truth. Practice of truth and Ahimsa constitute the crown and glory of ethical life. In the Taittiriya Upanishad, the preceptor says in his convocation address to the students: "Satyam vada—Speak the truth." The world is rooted in truth. Dharma is rooted in truth. All religions are rooted in truth. Honesty, justice, straightforwardness and sincerity are only modifications or expressions of truth.