ABSTRACT
The doctrine that all human knowledge is oriented toward practice belonged to the nucleus of ancient philosophy. It was Aristotle’s view that the truths arrived at through knowledge should direct practice in daily life as in the arts and sciences. In their struggle for existence, men need the effort of knowledge, the search for truth, because what is good, beneficial, and right for them is not immediately evident. Artisan and merchant, captain and physician, general and statesman – each must have correct knowledge in his field in order to be capable of acting as the changing situation demands.
