who said to every action there is a reaction
Reaction (physics) As described by the third of Newton's laws of motion of classical mechanics, all forces occur in pairs such that if one object exerts a force on another object, then the second object exerts an equal and opposite reaction force on the first.[1][2] The third law is also more generally stated as: "To every action there is always opposed an equal reaction: or the mutual actions of two bodies upon each other are always equal, and directed to contrary parts."[3] The attribution of which of the two forces is the action and which is the reaction is arbitrary. Either of the two can be considered the action, while the other is its associated reaction.
Voltaire Voltaire's works, especially his private letters, frequently contain the word "l'infâme" and the expression "écrasez l'infâme", or "crush the infamous". The phrase refers to abuses of the people by royalty and the clergy that Voltaire saw around him, and the superstition and intolerance that the clergy bred within the people.[107] He had felt these effects in his own exiles, the burnings of his books and those of many others, and in the hideous sufferings of Jean Calas and François-Jean de la Barre. He stated in one of his most famous quotes that "Superstition sets the whole world in flames; philosophy quenches them."[108]