Isaiah 29:15
15Woe to those who deeply hide their counsel from the LORD, and whose deeds are in the dark, and who say, “Who sees us?” and “Who knows us?”
Wesley: seek deep—a metaphor from men who use to dig deep into the earth, that they may hide any thing there. To hide—vainly imagining that they can deceive, not only men, but God, by their external professions. Who—neither God nor man can discover us.
“Who sees us?” is the question of people who think outward religion can hide inward plans. Wesley’s picture of digging deep to bury something fits: the counsel is hidden from men, never from God.
Calvin: woe to them that conceal themselves from Jehovah. They hide themselves in their cunning, as in a labyrinth; they dug for themselves concealment and lurking-places, that by means of them they might deceive God. Who seeth us? Not that wicked men ventured openly to utter these words, but they thus spoke or thus thought in their hearts. They abandoned themselves to all wickedness as if there would never be a judgment of God. He has to do with ungodly men who professed some knowledge of God but in reality denied him.
This is nothing else than to affirm that God is not a Judge. Rulers are principally chargeable. The church hears Judah’s scorners in Isaiah’s century.”