# Distance

Distance is a numerical description of how far apart objects are. In physics or everyday discussion, distance may refer to a physical length, or an estimation based on other criteria (e.g. "two counties over"). In mathematics, a distance function or metric is a generalization of the concept of physical distance. A metric is a function that behaves according to a specific set of rules, and provides a concrete way of describing what it means for elements of some space to be "close to" or "far away from" each other. In most cases, "distance from A to B" is interchangeable with "distance between B and A".

Read more about Distance:  Distance Versus Directed Distance and Displacement, Other "distances"

### Famous quotes containing the word distance:

I do believe that the outward and the inward life correspond; that if any should succeed to live a higher life, others would not know of it; that difference and distance are one. To set about living a true life is to go on a journey to a distant country, gradually to find ourselves surrounded by new scenes and men; and as long as the old are around me, I know that I am not in any true sense living a new or a better life.
Henry David Thoreau (1817–1862)

As distance shows a horse’s strength, so time reveals a person’s heart.
Chinese proverb.

Let me approach at least, and touch thy hand.
[Samson:] Not for thy life, lest fierce remembrance wake
My sudden rage to tear thee joint by joint.
At distance I forgive thee, go with that;
Bewail thy falsehood, and the pious works
It hath brought forth to make thee memorable
Among illustrious women, faithful wives:
Cherish thy hast’n’d widowhood with the gold
Of Matrimonial treason: so farewel.
John Milton (1608–1674)