Colossians 3:1-4 ESV
“If then you have been raised with Christ, seek the things that are above, where Christ is, seated at the right hand of God. Set your minds on things that are above, not on things that are on earth. For you have died, and your life is hidden with Christ in God. When Christ who is your life appears, then you also will appear with him in glory.”
Since we are in Christ and risen with Him through faith (Romans 6:1-4), we should strive to set our affections (phroneo) on things above. Where the affections are set to doesn’t matter nearly as much as the object on which they are set. We’re told to seek things above because it’s there that Jesus is seated. For that reason, setting affections on earth is useless.
Where your treasure is will determine where your heart is (Matt. 6:21). The heart is the human control center. Therefore, if our hearts are inclined toward earthly things, we will gladly submit to the control of those things. Conversely, if our hearts are set towards heaven, where Jesus is seated, heavenly desires will fill our hearts; the chiefest of which is our desire to know Him.
Seeking things above is shorthand for seeking Jesus and all that may come from/through union with Him. We are seeking One we do not see; yet, this One sees us and will return for us and appear to us in glorious fashion. The One in whom our life is hidden will someday appear to all the world, and we too will appear with Him in glory.