Keep thy heart with all diligence; for out of it are the issues of life
How wise is God to say, “Keep thy heart with all diligence; for out of it are the issues of life” (Prov. 4:23). Again, as a man “thinketh in his heart, so is he” (Prov. 23:7). It is not what I do, or what I say with my lips; but what I really am, is what my heart is, what the affections are occupied with. I believe we are in a day when intelligence goes very far ahead of the heart. I shall not be speaking too plainly if I say the secret of the want of a great deal of spiritual power is pride of heart. Hence would I say before God, let us beware of backsliding in heart. God must have reality.
The Gospel Messenger 1903, p. 196