Iteration, like friction, is likely to generate heat instead of progress.
George Eliot (1819-1880) British writer.
Repetition is the reality and the seriousness of life.
Soren Kierkegaard (1813-1855) Danish philosopher and writer.
There is no absurdity so palpable but that it may be firmly planted in the human head if you only begin to inculcate it before the age of five, by constantly repeating it with an air of great solemnity.
Arthur Schopenhauer (1788-1860) German philosopher.