Mat 10:27
What I tell you in darkness, you speak in light: and what you hear in the ear, you preach upon the housetops.

Another verse with many meanings, especially the first part, all of them interesting.

"What" is hos, which means "who," "what," "which" and "that." (A different word with the same spelling means "like" or "as.")

"I tell" is lego, which has three distinct meanings. It means "to lay asleep" and "to lull asleep." It also means "to gather" and "to pick up." Finally, it means "to say" and "to speak." It also has a many ancillary meanings such as "to count" ("to number" or like we might say, "to recount" a story) or "to choose for yourself."

"Darkness" is skotia, which means both "darkness" and is the metaphor for "ignorance."

"You speak" is epo (yes, an entirely different word), which means "to say" but it only has a definitive past tense (a finished action). It is from epos, which means "utterance."

"Light" is phos, which means both "light" and is the metaphor for "knowledge."

So this first part can also mean: "As I gather you in ignorance and you spoke in knowledge." or "That which lulled you to sleep in the darkness and you spoke in the light." The first describes a transformation, while the second describes learning slowly penetrating our thought.

"Preach" is kerusso, which means to "act as a herald" and "to make a proclaimation."

"On" is epi, which mean "upon," "at" or "before."

"Housetops" is doma, which means a "a house," "a hall," "a roof," or "a family." If isn't the word Matthew usually uses from "house" or "household," which is oikia.

So Christ describes the apostles proclaiming from the rooftop or before a hall.