Impact-Reaction

Attack is the reaction; I never think I have hit hard unless it rebounds. (Johnson)

The meeting of two personalities is like the contact of two chemical substances: if there is any reaction, both are transformed. (Jung)

Religion is a man's total reaction upon life. (James)

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. (Newton)