Such at least was the opinion of Mr.Ticknor, who says:-- "He was in the perfection of manly beauty and strength; his form filled out to its finest proportions, and his bearing, as he stood before the vast multitude, that of absolute dignity and power.

His manner of speaking was deliberate and commanding.

I never heard him when his manner was so grand and appropriate; ...

when he ended the minds of men were wrought up to an uncontrollable excitement, and then followed three tremendous cheers, inappropriate indeed, but as inevitable as any other great movement of nature." He had held the vast audience mute for over two hours, as John Quincy Adams said in his diary, and finally their excited feelings found vent in cheers.
He spoke greatly because he felt greatly.

His emotions, his imagination, his entire oratorical temperament were then full of quick sensibility.