The serenity of mind, gentleness, silence, self-restraint, and the purity of mind are called the austerity of thought.

Humility, modesty, nonviolence, forbearance, honesty, service to guru, purity (of thought, word, and deed), steadfastness, self-control; and / Aversion towards sense objects, absence of ego, constant reflection on the agony and suffering inherent in birth, old age, disease, and death.

Persons of demonic nature do not know what to do and what not to do. They neither have purity nor good conduct nor truthfulness.

A person is said to have achieved yoga, the union with the Self, when the perfectly disciplined mind gets freedom from all desires, and becomes absorbed in the Self alone.

One gradually attains tranquillity of mind by keeping the mind fully absorbed in the Self by means of a well-trained intellect, and thinking of nothing else.

A Karma-yogi performs action by body, mind, intellect, and senses, without attachment (or ego), only for self-purification.