Kindness is one of several behaviors that people often confuse.
In its most basic definition, kindness is a tendency toward gentle behavior in dealing with others. People who display this behavior are said to be thoughtful, considerate, warmhearted, agreeable, tolerant and forgiving.
Kindness is often mistaken for common courtesy as people that practice one are usually more apt to practice the other. They are not exactly the same but are both rare and exceptional to find.
Kindness does NOT automatically equal charity. While a kind person may be chairitable, the definition and motives for chairity can be quite different given the situation. For instance, a person who would never be considered kind may give to chairity for tax purposes, recognition or entirely pragmatic reasons.
example: People were surprised to discover that Mr. LeGree, a notorious misanthrope, had donated 100,000 a year to the Beat Cancer Now Foundation for decades. The act only made sense when his papers were published and we find out that his mother died of breast cancer and how deeply it affected him.