Full Idea
An intelligence knowing at an instant the whole universe could know the movement of the largest bodies and atoms in one formula, provided his intellect were powerful enough to subject all data to analysis. Past and future would be present to his eyes.
Gist of Idea
If a supreme intellect knew all atoms and movements, it could know all of the past and the future
Source
Pierre Simon de Laplace (Philosophical Essay on Probability [1820]), quoted by Mark Thornton - Do we have free will? p.70
Book Reference
Thornton,Mark: 'Do We Have Free Will?' [Bristol 1989], p.70