Vox Populi Vox Dei
This does not mean that the voice of the many is wise and good, but only that it is irresistible. You might as well try to stop the tide of the Atlantic as to resist the vox populi. As God's laws cannot be withstood, neither can the popular will. After Edward II. had been dethroned by the people in favour of his son (Edward III.), Simon Mepham, Archbishop of Canterbury, preached from these words as his text.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894