Titus 1:15 – To the pure, all things are pure, but to those who are corrupted and do not believe, nothing is pure. In fact, both their minds and consciences are corrupted.
If your mind is pure and your heart is pure, then your actions will be also. We know that God looks beyond the actions of a man and looks at the heart. He judges the motive behind the action. Knowing that brings light to this verse.
James tells us “wash your hands you sinners and purify your hearts you double minded.” We were sinners. We were corrupt and nothing in us was pure. Our mind, our heart, even our conscience, which is supposed to tell us right from wrong, was corrupted. Now we are different; we are changed. God has rescued us from that state.
When we accept Christ into our heart and mind and receive Him as our Lord and Savior we become a new person. The old is gone; the new has come. God has taken our impure heart and purified it. Then we renew our mind with the Word and watch as our life transforms to become a reflection of God’s glory.
Now we must guard our hearts. We have to protect what goes in. God has made it pure and we don’t want to let it be corrupted again. Our life flows out of our heart so it is important to keep it pure so that we can live a pure life.
So, to sum it up, you are no longer corrupt because you believe. And as long as you keep your heart and mind pure everything you do will be pure.