Love and you shall be loved. All love is mathematically just, as much as the two sides of an algebraic equation.
— Ralph Waldo Emerson

If you have a sister and she dies, do you stop saying you have one? Or are you always a sister, even when the other half of the equation is gone?
Jodi Picoult equation quote

In studying mathematics or simply using a mathematical principle, if we get the wrong answer in sort of algebraic equation, we do not suddenly feel that there is an anti-mathematical principle that is luring us into the wrong answers.
— Eric Butterworth

My intention here is to make it clear that not a single cell of my composition, here in regard to The Raven, is found by chance or intuition, that the composition moved towards perfection with the precision and inevitability of a mathematical equation.
— Maurice Ravel

The opponents and I are really one. My strength and skills only half of the equation. The other half is theirs. An opponent is someone whose strength joined to yours creates a certain result.
— Sadaharu Oh