Othello states he is now "knowing a little". What does Othello say "knowing a little" has done to his view of war and his occupation as military general? Why has this knowing a little changed it?

This quote, as I understand it, has more to do with Iago's taunting half-truths of information that he feeds Othello about Desdemona's elegit infidelity. Othello says he would rather be tricked outright than fed incomplete information.