What a peculiar privilege has this little agitation of the brain which we call 'thought'.
— David Hume

It is odd but agitation or contest of any kind gives a rebound to my spirits and sets me up for a time.
Lord Byron agitations quote

The purely agitation attitude is not good enough for a detailed consideration of a subject.
— Jawaharlal Nehru

The greater the feeling of inferiority that has been experienced, the more powerful is the urge to conquest and the more violent the emotional agitation.
— Alfred Adler

If there is no struggle there is no progress. Those who profess to favor freedom and yet deprecate agitation, are men who want crops without plowing up the ground, they want rain without thunder and lightning. They want the ocean without the awful roar of its many waters. This struggle may be a moral one, or it may be a physical one, and it may be both moral and physical, but it must be a struggle. Power concedes nothing without a demand. It never did and it never will.
— agitations quotation by Frederick Douglass