The gospel holds out the grand possibility of a pure heart.  The starting place of a pure heart for the Christian is the cleansing of the heart provided by Jesus Himself through His blood and the purging work of the Holy Spirit.  A pure heart is an examined heart; a soul-center that has pure intent without bad motives. We must let the Spirit root out of us any sprouts of sin or wickedness that may seek to spring up.  A pure heart is like a clean river stone that is not made so by a single washing, but is kept so by living under the Stream.

“But the goal of our instruction is love from a pure heart and a good conscience and a sincere faith. For some men, straying from these things, have turned aside to fruitless discussion, wanting to be teachers of the Law, even though they do not understand either what they are saying or the matters about which they make confident assertions.” (1 Timothy 1:5–7 NASB).