Paul is in prison as he writes to the Church, challenging them through their difficulties. (He had never even visited there.) No matter where he was, he lived out the Will of God. He encouraged others instead of being discouraged by his own circumstances.
Jesus and the Holy Spirit knew Their positions in the Trinity.
Psalm 110:1; II Sam. 7:12; Luke 22:69
The verb in Col. 3:1 means "co-resurrected".
We forget our position when we fail to feed the Spirit. As Believers, we sometimes lean on our own understanding, walk by sight instead of faith, fail to pay attention to consciously include God, allow pride to stand in our way, etc.
"Seek those things which are above..." (His glory, His will, His power, patience, whatsoever is pure, whatsoever is lovely, etc. : eternal things)
Sometimes we live in sin because we take God's grace for granted.
Sin does not have power over us; our position in Christ leads us to righteousness.
When we take a stand then "play out of position", people notice. When we stumble and fall, we should repent, apologize, take responsibility, then be accountable, transparent, and humble.
Paul wrote from prison to remind and encourage the Church of its position in Christ, and to set its sights on eternal things instead of temporary things.