Bible Verses about 'Mystery'

To them God chose to make known how great among the Gentiles are the riches of the glory of this mystery, which is Christ in you, the hope of glory.
Colossians 1:27 evangelism Jesus hope
Without any doubt, the mystery of our religion is great:
He was revealed in flesh,
vindicated in spirit,
seen by angels,
proclaimed among Gentiles,
believed in throughout the world,
taken up in glory.
1 Timothy 3:16 Jesus Spirit angels

I want their hearts to be encouraged and united in love, so that they may have all the riches of assured understanding and have the knowledge of God's mystery, that is, Christ himself.
Colossians 2:2 Jesus encouragement love
Just as you do not know how the breath comes to the bones in the mother's womb, so you do not know the work of God, who makes everything.
Ecclesiastes 11:5 God understanding