THE GOSPEL ACCORDING TO MATTHEW - Chapter 10 - Verse 27

Verse 27. What I tell you in darkness, etc. That is, in secret, in private, in confidence. The private instructions which I give you while with me, do you proclaim publicly, on the house top. The house top, the flat roof, was a public conspicuous place. See 2 Sa 16:22. See Barnes "Mt 9:2".