and may be found in Him [believing and relying on Him], not having any righteousness of my own derived from [my obedience to] the Law and its rituals, but [possessing] that [genuine righteousness] which comes through faith in Christ, the righteousness which comes from God on the basis of faith.

Even though they have the appearance of wisdom with their self-imposed worship and false humility achieved by an unsparing treatment of the body -- a wisdom with no true value -- they in reality result in fleshly indulgence.