Othello first spoke humbly of his limitations in life, stressing that since he was seven years old he had been in military service. He said, perhaps not exactly truthfully, that he was little blessed with expressiveness in speech and that--other than the battle fields of war--he had seen little of the world. Secondly he called upon Desdemonia's witness to confirm or dispute his innocence; much is weighted by this choice as it testifies that neither the judicial system nor Othello presented any coercive threat to desdmonia's speech. Thirdly, Othello gave step-by-step testimony of the transactions between himself and her father then, later between himself and Desdemona with her father's presence and permission as Othello was a guest in his home.
Her father loved me; oft invited me;
Still question'd me the story of my life,
From year to year, the battles, sieges, fortunes,
That I have passed.
I ran it through, even from my boyish days,
To the very moment that he bade me tell it;