The account with purity
Out of the heart proceed … Matthew 15:18–20 .
We begin by trusting our ignorance and calling it innocence, by trusting our innocence and calling it purity; and when we hear these rugged statements of Our Lord’s, we shrink and say—‘But I never felt any of those awful things in my heart.’ We resent what Jesus Christ reveals. Either Jesus Christ is the supreme Authority on the human heart, or He is not worth paying any attention to. Am I prepared to trust His penetration, or do I prefer to trust my innocent ignorance? If I make conscious innocence the test, I am likely to come to a place where I find with a shuddering awakening that what Jesus Christ said is true, and I shall be appalled at the possibility of evil and wrong in me. As long as I remain under the refuge of innocence, I am living in a fool’s paradise. If I have never been a blackguard, the reason is a mixture of cowardice and the protection of civilized life; but when I am undressed before God, I find that Jesus Christ is right in His diagnosis.
The only thing that safeguards is the Redemption of Jesus Christ. If I will hand myself over to Him, I need never experience the terrible possibilities that are in my heart. Purity is too deep down for me to get to naturally: but when the Holy Spirit comes in, He brings into the centre of my personal life the very Spirit that was manifested in the life of Jesus Christ, viz. Holy Spirit, which is unsullied purity.
Oswald Chambers, My Utmost for His Highest: Selections for the Year (Grand Rapids, MI: Oswald Chambers Publications; Marshall Pickering, 1986).