Courage - a perfect sensibility of the measure of danger, and a mental willingness to endure it.
William Tecumseh Sherman

Creative people who can't help but explore other mental territories are at greater risk, just as someone who climbs a mountain is more at risk than someone who just walks along a village lane.
R. D. Laing

Dealing with complexity is an inefficient and unnecessary waste of time, attention and mental energy. There is never any justification for things being complex when they could be simple.
Edward de Bono

Do we talk about the dignity of work? Do we give our students any reason for believing it is worthwhile to sacrifice for their work because such sacrifices improve the psychological and mental health of the person who makes them?
Sargent Shriver

Do you not see, first, that - as a mental abstract - physical force is directly opposed to morality; and secondly, that it practically drives out of existence the moral forces?
Auberon Herbert

Eccentricity has always abounded when and where strength of character had abounded; and the amount of eccentricity in a society has generally been proportional to the amount of genius, mental vigor, and courage which it contained.
John Stuart Mill

Emancipate yourselves from mental slavery, none but ourselves can free our minds!
Bob Marley

Enter every activity without giving mental recognition to the possibility of defeat. Concentrate on your strengths, instead of your weaknesses... on your powers, instead of your problems.
Paul J. Meyer

Enthusiasms, like stimulants, are often affected by people with small mental ballast.
Minna Antrim

Europe is no longer Europe, it is Eurabia, a colony of Islam, where the Islamic invasion does not proceed only in a physical sense, but also in a mental and cultural sense.
Oriana Fallaci

Even by common wisdom, there seem to be both people and objects in my dream that are outside myself, but clearly they were created in myself and are part of me, they are mental constructs in my own brain.
Ray Kurzweil

Every day I went to the ballpark in Yankee Stadium as well as on the road people were on my back. The last six years in the American League were mental hell for me. I was drained of all my desire to play baseball.
Roger Maris

Faith, to my mind, is a stiffening process, a sort of mental starch.
E. M. Forster

Focusing isn't just an optical activity, it is also a mental one.
Bridget Riley

For me, literature is a complex game, both mental and concrete, which is acted out in a physical manner on the page.
Guillermo Cabrera Infante

For too long we have swept the problems of mental illness under the carpet... and hoped that they would go away.
Richard J. Codey

Formulate and stamp indelibly on your mind a mental picture of yourself as succeeding. Hold this picture tenaciously. Never permit it to fade. Your mind will seek to develop the picture... Do not build up obstacles in your imagination.
Norman Vincent Peale

From the standpoint of observation, then, we must regard it as a highly probable hypothesis that the beginnings of the mental life date from as far back as the beginnings of life at large.
Wilhelm Wundt

Greed probably figures in my intellectual life as well, as I attempt to absorb a massive amount of information with consequent mental indigestion.
Etty Hillesum

Happiness doesn't depend on any external conditions, it is governed by our mental attitude.
Dale Carnegie