Truth is duty; Truth is penance; Truth is Yoga; and Truth is the eternal Brahma. Truth has been said to be a great sacrifice. Everything depends upon Truth.
सत्यं धर्मस्तपो योगः सत्यं ब्रह्म सनातनम्। सत्यं यज्ञः परः प्रोक्तः सर्वं सत्ये प्रतिष्ठितम्॥