'Secret' in the Bible

so that thine alms may be in secret, and thy Father who sees in secret will render it to thee.

But thou, when thou prayest, enter into thy chamber, and having shut thy door, pray to thy Father who is in secret, and thy Father who sees in secret will render it to thee.

so that thou mayest not appear fasting unto men, but to thy Father who is in secret; and thy Father who sees in secret shall render it to thee.

Fear them not therefore; for there is nothing covered which shall not be revealed, and secret which shall not be known.