THe mystery is Christ in you

Colossians 1:24-29
The mystery that has been kept hidden for ages and generations, but is now disclosed to the saints. To them God has chosen to make known among the Gentiles the glorious riches of this mystery, which is Christ in you, the hope of glory.
We proclaim him, admonishing告誡and teaching everyone with all wisdom, so that we may present everyone perfect in Christ.
Paul rejoice in what was suffered , and he full up his flesh what is still lacking in regard to Christ's afflictions, for the sack of his body- church , and he labor, struggling with all his energy.
Why?
The apostle's job is to make God's message known.
The philosophers hint at secrets, at deep things known only to the initiated. This is God's open secret: 'Christ - in you'. A share in God's own glory for every Christian! This is a 'secret' worth knowing.
Lacking: Paul applies to himself the same patten, of suffering on behalf of others, that was worked out on the cross. He is not adding to that work:Christ's saving work is complete.
But in the overlapping of the ages, between Christ's resurrection and his return, God's new people will suffer as their Master did.
What is lacking in regarding to Christ's affliction for the sack of his body - church. It is the love of initiate.
How?
Christ is in me, so I won't worry about other suffering or threaten from evil. Shell  I serve the Lord at Lanya church?