Hebrews 3:13
4 Wherefore “exhort ye one another daily, while it is called today.” That is, edify one another, raise yourselves up: lest the same things should befall you. “Lest any one of you be hardened by the deceitfulness of sin.” Do you see that sin produces unbelief? For as unbelief brings forth an evil life, so also a soul, “when it has come into a depth of evils, becomes contemptuous”, and having become contemptuous it endures not even to believe, in order thereby to free itself from fear. For “they said” (one says), “The Lord shall not see, neither shall the God of Jacob regard.” And again, “Our lips are our own: who is Lord over us?”; and again “Wherefore has the wicked man provoked God to wrath?”; and again, “The fool has said in his heart, there is no God; they are corrupt and become abominable in their doings.” “There is no fear of God before his eyes, for he was deceitful before Him, to find out his iniquity and to hate.” Yea and Christ also says this same thing, “Every one that does evil, hates the light and comes not to the light.”
Source: Homilies on the Epistle to the Hebrews (New Advent)