For the man in the world who is continually being subjected to the wear and tear of tension, frustration and disappointment, who is living under continual pressure, yoga should bring about equilibrium and balance of mind.
There are three important categories of relaxation. Asanas and pranayamas belong to one category of relaxation, trataka and yoga nidra belong to another category of relaxation, bhakti and raja yoga belong to the third category of relaxation.
Karma yoga and jnana yoga are common to all the categories of relaxation. Through karma yoga you integrate your body, through bhakti you purify your emotions. Through raja yoga mental capacities are awakened, and by jnana yoga the intellect is trained and there is complete rationalization and understanding.