Crossword puzzle clue "words from one about to quote himself"

Words from one about to quote himself

"___ should keep himself to himself": "Treasure Island"

"Man will do many things to get himself loved, he will do all things to get himself ___": Mark Twain

Othello's words as he stabs himself

One who's often not himself?

One who talks only about himself, say

One who always finds himself over a barrel?

One always in search of himself