స్వామి శివానంద సూక్తి

Keep the mind fully occupied. Then evil thoughts will not enter. An idle brain is the devil’s workshop. Watch the mind every minute.
Always engage yourself in some work—stitching, cleaning vessels, sweeping, drawing water, reading, meditating, counting the beads, singing divine songs, praying, serving the elders or nursing the sick. Avoid loose talk and gossip. Fill the mind with sublime thoughts, such as those contained in the Gita, the Upanishads, the Yogavasishtha, etc.

- Swami Sivananda