Verb
have and exert influence or effect
Source: WordNetMan knows so little about his fellows. In his eyes all men or women act upon what he believes would motivate him if he were mad enough to do what that other man or woman is doing. William Faulkner
At this point we find ourselves confronted by a very disquieting question: Do we really wish to act upon our knowledge? Aldous Huxley
Do not Bodies act upon Light at a distance, and by their action bend its Rays; and is not this action (caeteris paribus) [all else being equal] strongest at the least distance? Isaac Newton
Who are you now? Who have you decided to become? Make this decision consciously. Make it carefully. Make it powerfully. Then act upon it. Anthony Robbins
It is always important in matters of high politics to know what you do not know. Those who think they know, but are mistaken, and act upon their mistakes, are the most dangerous people to have in charge. Margaret Thatcher
Communism is a proposition to structure the world more reasonably, a proposition for changing the world. As such, we have to analyze it and, if we deem it reasonable, act upon it. Friedrich Dürrenmatt