Drive Away Obnoxious Thoughts.
Drive away from your mind all unnecessary, useless and obnoxious thoughts. Useless thoughts impede your spiritual growth; obnoxious thoughts are stumbling blocks to spiritual advancement.
You are away from God when you entertain useless thoughts. Substitute thoughts of God.
Entertain only thoughts that are helpful and useful. Useful thoughts are the stepping-stones to spiritual growth and progress.
Do not allow the mind to run into the old grooves and to have its own ways and habits.
Be on the careful watch.
If a pebble in our boot torments us, we expel it. We take off the boot and shake it out.
Once the matter is fairly understood, it is just as easy to expel an intruding and obnoxious thought from the mind. About this there ought to be no doubt, no two opinions. The thing is obvious, clear and unmistakable.
It should be as easy to expel an obnoxious thought from your mind as it is to shake a stone out of your shoe; and, till a man can do that, it is just nonsense to talk about his ascendancy and conquest over nature. He is a mere slave and prey to the bat-winged phantoms that flit through the corridor of his brain.
~ Sri Swami Sivananda, Thought Power