We frequently define an acid or a base as a substance whose aqueous solution gives, respectively, a higher concentration of hydrogen ion or of hydroxide ion than that furnished by pure water. This is a very one sided definition.
Gilbert Newton Lewis

We may say that a basic substance is one which has a lone pair of electrons which may be used to complete the stable group of another atom, and that an acid is one which can employ a lone pair from another molecule in completing the stable group of one of its own atoms.
Gilbert Newton Lewis

We must get the American public to look past the glitter, beyond the showmanship, to the reality, the hard substance of things. And we'll do it not so much with speeches that will bring people to their feet as with speeches that bring people to their senses.
Mario Cuomo

We must look for ways to be an active force in our own lives. We must take charge of our own destinies, design a life of substance and truly begin to live our dreams.
Les Brown

We speak of virtue, honour, reason; but our thought does not translate any one of these concepts into a substance.
Wilhelm Wundt

We think that the Kyoto protocol is a necessary document, necessary process. I am convinced that we will agree to disagree about substance.
Goran Persson

What makes literature interesting is that it does not survive its translation. The characters in a novel are made out of the sentences. That's what their substance is.
Jonathan Miller

What will the U.S. senators have to say if there is, as many over here and in the rest of the world suspect, no substance to the allegations against my father and me?
Kojo Annan

What, but the rapacity of the only men who exercised their reason, the priests, secured such vast property to the church, when a man gave his perishable substance to save himself from the dark torments of purgatory.
Mary Wollstonecraft

When I'm dead, I want to be remembered as a musician of some worth and substance.
Freddie Mercury

Wherefore the mere practical architect is not able to assign sufficient reasons for the forms he adopts; and the theoretic architect also fails, grasping the shadow instead of the substance.
Marcus V. Pollio

Words are also seeds, and when dropped into the invisible spiritual substance, they grow and bring forth after their kind.
Charles Fillmore

Yet Aristotle's excellence of substance, so far from being associated with the grand style, is associated with something that at times comes perilously near jargon.
Irving Babbitt

You can take a substance that works in your system, but then you take this over here that's not banned, and this over here that's not banned, but if you mix them together, you've got a banned substance in your system.
Lawrence Taylor

You cannot set art off in a corner and hope for it to have vitality, reality, and substance.
Charles Ives

You have indeed done much since the new century began to give shape and substance to the growing, the insistent desire that war may be banished from the earth.
Henry Campbell-Bannerman