Both of these statements mean the same thing. Being concealed or hidden represents being kept secret, and being revealed represents being made known. Jesus is emphasizing that God will make all things known. This can be stated in active form. AT: "God will reveal the things that people hide" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-activepassive]])
Both of these statements mean the same thing. Jesus is emphasizing that the disciples should tell everyone what he tells the disciples in private. AT: "Tell people in the daylight what I tell you in the darkness, and proclaim upon the housetops what you hear softly in your ear" (See: [[rc://en/ta/man/translate/figs-parallelism]])
Here "darkness" is a metonym for "in private." AT: "What I say to you secretly" or "The things I am telling you privately" (See: [[rc://en/ta/man/translate/figs-metonym]])
Housetops where Jesus lived were flat, and people far away could hear anyone speaking with a loud voice. Here "housetops" refers to any place where all people can hear. AT: "speak loudly in a public place for all to hear" (See: [[rc://en/ta/man/translate/figs-metonymy]])