What is "principling"

Principle \Prin"ci*ple\, v. t. [imp. & p. p. Principled; p. pr. & vb. n. Principling.] To equip with principles; to establish, or fix, in certain principles; to impress with any tenet, or rule of conduct, good or ill.

Governors should be well principled.
--L'Estrange.

Let an enthusiast be principled that he or his teacher is inspired.
--Locke.

vb. (present participle of principle English)