Matthew 13:35
that it might be fulfilled which was spoken by the prophet, saying, I will open my mouth in parables, I will publish things which have been concealed from the foundation of the world.
Matthew 13:11-15
And He answered them, saying, Because it is granted unto you to know the mysteries of the kingdom of heaven, but to them it is not granted:
Luke 12:3
Therefore whatsoever ye have said in darkness shall be heard in the light: and what ye have spoken in the ear in closets shall be proclaimed on the house-tops.
2 Corinthians 3:12
Having therefore such hope, we use much freedom of speech: