However, no person of impure motives ever acquires a great degree of psychic power, and a pure heart and mind is an invulnerable shield against improper psychic power.

Keep yourself pure and nothing can hurt you.
(2) FORMING AN AURA.
If you are ever in the company of persons of a low order of mind, and you feel the depressing influence of their thought, breathe rhythmically a few times, thus generating an additional supply of prana, and then by means of the mental image method surround yourself with an egg-shaped thought aura, which will protect you from the gross thought and disturbing influences of others.
(3) RECHARGING YOURSELF.
If you feel that your vital energy is at a low ebb, and that you need to store up a new supply quickly, the best plan is to place the feet close together (side by side, of course) and to lock the fingers of both hands in any way that seems the most comfortable.

This closes the circuit, as it were, and prevents any escape of prana through the extremities.

Then breathe rhythmically a few times, and you will feel the effect of the recharging.
(4) RECHARGING OTHERS.
If some friend is deficient in vitality you may aid him by sitting in front of him, your toes touching his, and his hands in yours.

Then both breathe rhythmically, you forming the mental image of sending prana into his system, and he holding the mental image of receiving the prana.