I have got your point. You developed your definition further. You could not be confident in your position without the strong belief. Of course, the truth is ultimate right thing, opinion can not be neither right or wrong. Opinions are ways, that individuals utilise to alter the truth in their favor. The matter is that you cannot change the truth and it is common that you do not know the truth. But you can show that your opinion is truth-alike by formulating your position, which is promise of opinion (kind of your truth perception) pursuing in your everyday life.