He who walks [as a companion] with wise men is wise, but he who associates with [self-confident] fools is [a fool himself and] shall smart for it. [Isa. 32:6.]
And He said to them, To you has been entrusted the mystery of the kingdom of God [that is, the secret counsels of God which are hidden from the ungodly]; but for those outside [of our circle] everything becomes a parable,