His convictions gained weight from the simplicity, uprightness and diligence of his character; but they need a more effective justification than he was able to give them.
The mere fact that he was able to attract to himself so considerable a body of respectable followers, including such men as Ellwood, Barclay, Penington and Penn, is sufficient to prove that he possessed in a very eminent degree the power of conviction, persuasion, and moral ascendancy; while of his personal uprightness, single-mindedness and sincerity there can be no question.
This fact determined the stadtholder, Maurice of Nassau, to support the orthodox party - a party to which he inclined the more readily that Olden Barneveldt, the grand pensionary, the man whose uprightness and abilities he most dreaded, sided with the Remonstrants.
Lord Moira's sound judgment on public affairs, combined with his military reputation and the uprightness of his character, won for him a high position among the statesmen of the day, and he gained an additional prestige from his intimate relations with the prince of Wales.
His great learning was equalled by the modest simplicity of his life and the uprightness of his conduct.