Bhagavad Gita 18.42शमो दमस्तपः शौचं क्षान्तिरार्जवमेव च।ज्ञानं विज्ञानमास्तिक्यं ब्रह्मकर्म स्वभावजम् ॥

Sama is control of the mind. Dama is control of the senses. Serenity and selfrestraint have already been explained in XVII.2. Austerity of the three kinds has also been explained in XVII.14 to 16.Astikyam Faith in the words of the Guru, in the teachings of the scriptures, in the existence of God, in the life beyond or hereafter and in ones own Self.The mind is absorbed in the Self. This gives peace. Selfrestraint is the helpmate of peace. In obeying the inunctions of the scriptures alone you will attain peace and spiritual progress. You must not argue too much. You must have reverence for and faith in the teaching.As the sandalwood tree is fragrant with its own sweet scent, as a Champaka tree is adorned by its lovely flowers, so also a Brahmana is adorned by these nine virtues which are inseparable from him.Now, O Arjuna, listen to the duties of a Kshatriya.