Continuing from earlier a quote on statistics from an interesting article:
The techniques of determining significance are a serious study in themselves, but the common sense cautions in using them may be summed up in two statements: a difference that does not make a difference is not a difference; and: there is a vast difference between something’s being statistically significant and something’s being important.
 William Bruce Cameron, 1957: The Elements of Statistical Confusion: Or: What Does the Mean Mean?, in: AAUP Bulletin; Vol. 43, No. 1 (Spring, 1957), pp. 33-39; Published by: American Association of University Professors; Article Stable URL: http://www.jstor.org/stable/40222110; page 39