Passage
but there is nothing covered up which shall not be revealed, nor secret that shall not be known;
but there is nothing covered up which shall not be revealed, nor secret that shall not be known;
Luke 12:1 In those [times], the myriads of the crowd being gathered together, so that they trod one on another, he began to say to his disciples first, Beware of the leaven of the Pharisees, which is hypocrisy;
Luke 12:2 but there is nothing covered up which shall not be revealed, nor secret that shall not be known;
Luke 12:3 therefore whatever ye have said in the darkness shall be heard in the light, and what ye have spoken in the ear in chambers shall be proclaimed upon the housetops.
Luke 12:4 But I say to you, my friends, Fear not those who kill the body and after this have no more that they can do.
The verse centers on "nothing", "covered", "shall", "revealed", "secret", and "known". It is saying that the verse draws attention to "nothing" and "covered", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 1's "In those times the myriads of the..." into verse 3's "therefore whatever ye have said in the...", so "nothing" and "covered" belong inside that flow. In Luke context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "nothing" and "covered" with trust shaped by these words, not by a vague optimism outside the passage.