There is no necessity for the man who means to be an orator to understand what is really just but only what would appear so to the majority of those who will give judgment; and not what is really good or beautiful but whatever will appear so; because persuasion comes from that and not from the truth.
PlatoThose who are not schooled and practised in truth [who are not honest and upright men] can never manage aright the government, nor yet can those who spend their lives as closet philosophers; because the former have no high purpose to guide their actions, while the latter keep aloof from public life.
Plato