Carnal thinking - EG has classified this as self thinking. This is not scriptural, but an odd distortion.
For everything in the world—the lust of the flesh, the lust of the eyes, and the pride of life—comes not from the Father but from the world.
1 John 2:16
Put to death, therefore, whatever belongs to your earthly nature: sexual immorality, impurity, lust, evil desires and greed, which is idolatry.
Col 3:5
For you have spent enough time in the past doing what pagans choose to do—living in debauchery, lust, drunkenness, orgies, carousing and detestable idolatry.
1 Peter 4:3
We are commanded to love ourselves and love our neighbour as much.
Showing respect for yourself is important, as much as God shows us respect and honour. He thought so highly of us, he died so that we might be called His friends.
Our one biggest failing is to not see things objectively. We either think of ourselves better than everyone else or worse. Very rarely we have a right view of ourselves and others. We are encouraged to think others better than ourselves so we do not demean them or bring them down, but give them the honour they deserve.
I find among all these ideas nothing that suggests self centred thought is the problem, rather it is self-indulgence, self interest, self-seeking, selfish ambition that often lead to sin.
In fact without self knowledge, and self understanding, and self control it would not be possible to be a christian or follow Christ. So it is no surprise such ideas cause such confusion.