'Fleshly' in the Bible

This is our [reason for] proud confidence: our conscience testifies that we have conducted ourselves in the world [in general], and especially toward you, with pure motives and godly sincerity, not in human wisdom, but in the grace of God [that is, His gracious lovingkindness that leads people to Christ and spiritual maturity].

Let no one defraud you of your prize [your freedom in Christ and your salvation] by insisting on mock humility and the worship of angels, going into detail about visions [he claims] he has seen [to justify his authority], puffed up [in conceit] by his unspiritual mind,

For this is why the good news [of salvation] was preached [in their lifetimes] even to those who are dead, that though they were judged in the flesh as men are, they may live in the spirit according to [the will and purpose of] God.

First of all, know [without any doubt] that mockers will come in the last days with their mocking, following after their own human desires