Warning: If you're empathic, you might feel alone and you may not want to shield but you should anyway.
You will get used to it. Picture an indestructible barrier going around your aura or body; the energy only draws from you and it does not give off energy. It does not glow or shine. It's slippery on the outside. You only decide what can come in or not. If you want to remove it just imagine it fading or going away from your body.
- credits to sarafiel angelus