To the natural mind of man - spiritual realities in Christ are foolishness to that mindset. The worldly humanistic mindset cannot see the truths of being a new creation in Christ - that we have a new heart now - created in righteousness and holiness.
For the message of the cross is foolishness to those who are perishing, but to us who are being saved it is the power of God.
1 Cor 1:18
But we preach Christ crucified: a stumbling block to Jews and foolishness to Gentiles.
1 Cor 1:23
Let the message of Christ dwell among you richly as you teach and admonish one another with all wisdom through psalms, hymns, and songs from the Spirit, singing to God with gratitude in your hearts.
Col 3:16
Paul is talking about it appearing foolishness that through the cross we might know love,
and life, when in the world it is power and influence that matter.
It is by sacrifice and laying down our lives that we find life, eternal life. This is the worlds
eyes is just failure, giving up the glories of what is possible for something that always
disappoints and is empty. So many end up despising love as merely idealistic optimism.
Now what is being addressed above is the idea by having faith in Christ we are made
perfect and eternal, a new spirit is put in us, which is our real identity, which we just now
have to recognise and everything will be fine.
This has nothing to do with establishing a real relationship with God, learning how to love,
letting love reign in your life and flow from your heart, this is another faith which is saying
this new identity just needs to take over.
There is no emphasis on purification, working through sin, emotional trauma, resolving
relationships of the past, becoming a new person through God working in us.
It is like getting a new package which we just unwrap. The words seem the same, but
their meaning is so different. To them I am an enemy, trying to create self righteousness,
rather than just learning to walk in righteousness and take ownership of the gift of life
Christ has given me. For us we are taking responsibility of the healing and freedom Christ
has put in our lives, for them it is just letting go, and letting God, as if things just happen.
This is like saying going to school is about just playing games and not working. You soon
learn if you do this, you waste the very gift of teachers, books, information etc that is
at your feet. It is just a denial of why you go to school in the first place.