“Guard your heart with all vigilance” (Prov 4:23). Nothing stained by falsehood has any real worth in the Lord’s eyes.The Father, “who sees in secret” (Mt 6:6), recognizes what is impure and insincere, mere display or appearance, as does the Son, who knows “what is in man” (cf. Jn 2:25).
-Pope Francis, Gaudete et Exsultate (n. 84)
Blessed are the pure of heart, for they will see God.