Euclid's Elements Book I, Proposition 3: Given two unequal straight lines, to cut off from the greater a straight line equal to the less
Let AB and CD be the two given unequal straight lines, and let AB be
the greater of them. Thus it is required to cut off from AB a straight
line equal to CD.
The Elements: Books I-XIII (Barnes & Noble Library of Essential Reading)
In its broad sense, education refers to any act or experience that has a formative effect on the mind, character, or physical ability of an individual...In its technical sense education is the process by which society, through schools, colleges, universities, and other institutions, deliberately transmits its cultural heritage--its accumulated knowledge, values, and skills--from one generation to another. George F. Kneller, Introduction to the Philosophy of Education (New York: John Wiley and Sons, 1971.)