Today I encountered a sentence:
A slave's education is not under natural authority but is under the arbitrary authority of the self-appointed and self-validating
I boldened the doubtful words and understood this like:
A slave's education is driven not by his own needs but by the will of someone other who is self-appointed (just proclaimed himself to be an absolute truth) and self-validating (either "judging himself on his own only" or "not requiring any confirmation of his competence" or "not bearing any objections")
Please help me to understand the true meaning.