Ideas won't keep; something must be done about them." ~ Alfred North Whitehead
Knowledge does not keep any better than fish.
You may he dealing with knowledge of the old species, with some old truth; but somehow or other it must come to the students, as it were, just drawn out of the sea and with the freshness of its immediate importance. (A.E. p. 147)
Periods of tranquility are seldom prolific of creative achievement. Mankind has to be stirred up.