On Purity of Mind and a Simple Intention
If your main object is the will of God and the good of your neighbour, you will have great interior freedom. If you heart is straight with God, then every creature will be a mirror of life and a book of heavenly teaching. If you had a heart that was good and pure, you would see all things clearly and understand them well. A clean heart penetrates both heaven and hell. As people are inwardly, so do they judge outward things.