# who deeply hide their plans from Yahweh

"who try to hide their plans from Yahweh" or "who try to keep Yahweh from finding out what they are planning to do"

# whose deeds are in darkness

"who do evil things in the dark so no one can see them" 

# Who sees us, and who knows us?

"No one, not even Yahweh, sees us or knows what we are doing!"