Most philosophers know nothing, and those philosophers who know one truth would use that one truth as a starting point to teaching others same truth, and the love of knowledge.

I must say, I am surprised at the -2 on that comment. The typo cannot have helped.

Edit: I meant “know nothing” in the Socratic fashion, which Is a very good place to be, relative to believing you know something and being mistaken.

The objective of a philosopher is to teach philosophy.

That means to help other people come to a love of knowledge.

Knowledge in this circumstance shares in virtue, and in this sense is an end to be sought persons.

I believe this is the correct answer for most vocations with minor variation, i.e. politician, poet, etc.

Edit: it should read “and in this sense is an end to be sought by all persons.”