μυστήριον mystērion, n. [27] [√ 3679]. mystery, secret; often refers to a misunderstood part of the Old Testament that, with Christ’s coming, is now unveiled.
past secret now revealed, hidden truth
In Scripture a “mystery” is truth that can be made known only by divine revelation at a time appointed by God and to those who are illumined by His Spirit. – W.E. Vine
