Pure vs impure
Let us soften our hearts by uniting what we hear from God with faith (Hebrews 4:2).
Let us look very carefully at our own hearts and actions, because we will only be held accountable for what we have done.
Our heart's response to moral failure
by Jeremy A. Lawson
Don't deceive your heart, keep it in subjection to Christ!
Defilement originates in the heart