" Keep thy heart with all diligence." - Proverbs 4:23.

Keep that which is good, in it; that which is evil, out: thoughts, feelings, purposes, imaginations, desires. Especially, keep God's word in it. Quench not the Spirit. Cherish a memory for what is good. Be as a gardener; be as a banker.

For the mind is God's wonderful gift.

As our thoughts, so our words and acts.

As our thoughts, so our future life.

Be as the pilot.

Thermopylae.

Our peace easily destroyed by unwatchfulness.

God looks at the heart.

Has given us suitable objects to think about, - to love.