What does Luke 12:3 mean?
As a traveling teacher, Jesus would have given the same teachings, in similar words, at different times. Here, His lesson is a warning to the disciples. They must watch what they say both in public and in private. Hypocrisy from any source will be made public on the day of judgment (Luke 12:1–2). Matthew's context is slightly different and the text reads, "What I tell you in the dark, say in the light, and what you hear whispered, proclaim on the housetops" (Matthew 10:27). That is, what Jesus tells the disciples in secret (Luke 8:10; 9:18–22), they will need to make public later. The active voice in Matthew means it is to be an act of the disciples. The passive voice in Luke indicates God's work.In Matthew's introduction to the Lord's Prayer, Jesus says:
"And when you pray, you must not be like the hypocrites. For they love to stand and pray in the synagogues and at the street corners, that they may be seen by others. Truly, I say to you, they have received their reward. But when you pray, go into your room and shut the door and pray to your Father who is in secret. And your Father who sees in secret will reward you" (Matthew 6:5–6).The "private rooms" in this verse are storerooms in the innermost part of the house. They may be the same as the "room" Jesus calls His followers to pray in, but they're used for a different purpose: to whisper blasphemies and consider how to destroy Jesus (Luke 11:53–54).
Scholars debate as to the proper application of Luke 12:2–3. Is it the Pharisees' words that will be made public or the disciples'? Will they be made known to other people or to God? In the next passage, Jesus tells the disciples that their words and their faithfulness to Him may result in their deaths, but God will keep them ultimately safe (Luke 12:4–7). In that context, the disciples should not act or speak hypocritically; they should not try to follow Jesus and placate the religious leaders. The religious leaders can only kill their bodies, while hypocrisy would reveal someone with no faith in Jesus at all, in which case God will not forgive them (Luke 12:8–10).