'Secret' in the Bible

He said to them, “The mystery of the kingdom of God has been given to you [who have teachable hearts], but those who are outside [the unbelievers, the spiritually blind] get everything in parables,

For nothing is hidden, except to be revealed; nor has anything been kept secret, but that it would come to light [that is, things are hidden only temporarily, until the appropriate time comes for them to be known].