Matthew 23:26
You blind Pharisee! First clean the inside of the cup and the dish, so that the outside may become clean as well.
Matthew 12:33
You must assume either that both tree and fruit are good, or that both tree and fruit are worthless; since it is by it's fruits that a tree is known.
Luke 6:45
A good man, from the good stores of his heart, brings out what is good; while a bad man, from his bad stores, brings out what is bad. For what fills a man's heart will rise to his lips.
2 Corinthians 7:1
With these promises, dear friends, let us purify ourselves from everything that pollutes either body or spirit, and, in deepest reverence for God, aim at perfect holiness.
Hebrews 10:22
let us draw near to God in all sincerity of heart and in perfect faith, with our hearts purified by the sprinkled blood from all consciousness of wrong, and with our bodies washed with pure water.
James 4:8
Draw near to God, and he will draw near to you. Make your hands clean, you sinners; and your hearts pure, you vacillating men!