I have never taken any substance to enhance my performance.

For me, alcohol has this endless fascination that there's this substance that can enhance life so beautifully and destroy it so completely.

— Jonathan Miles

Drugs won't enhance your performance.

— Morgan Brittany

“mindset impacts emotion, which alters biology, which increases performance. Thus, it seemed, by tinkering with mindset—using everything from physical to psychological to pharmacological interventions—one…

— Steven Kotler

Great achievement often happens when our backs are up against the wall. Pressure can actually enhance your performance.

— Robin Sharma

“This is another reason why flow states significantly enhance performance: when the “self” disappears, it takes many of our limits along for the ride.”

— Steven Kotler

You'll very rarely find that you can enhance a performance to give it a real emotional centre and truth... after the fact.

— Andy Serkis

But now in this day and age, people are more prone to go out to try new things to enhance their performance on the…

— Bo Jackson

What we've seen this season is that if something that will enhance performance is available, some players will indulge... unless the penalty is an…

— Michael Wilbon

Back when I was training, probably the only nutritious thing on the market was Gatorade-that's all that we knew. But now in this day…

— Bo Jackson

No form remains permanently in a substance; a constant change takes place, one form is taken off and another is put on.

— Maimonides

My sister stood up, trembling, and I must admit that I expected her familiar sneer to have taken its usual place on her face.…

— J. Robert Lennon

I separated the joints, the arm joints, the leg joints, and had to do two boilings. I think I used four boxes of Soilex…

— Jeffrey Dahmer

Words are substance strange. Speak one and the air ripples into another's ears. Write one and the eye laps it up. But the sense…

— Dan Beachy-Quick

This is true; virtually all edible substances, and many automotive products, are now marketed as being low-fat or fat-free. Americans are obsessed with fat…

— Dave Barry

... how much of our inner substance is it good for us to give to public griefs? The whole modern tendency to agonize over…

— Louise Bogan