… is from page 201 of the late David Landes’s often brilliant but uneven 1998 volume, The Wealth and Poverty of Nations (brackets and ellipses original to Landes):
As Fra Giordano put it in a sermon in Pisa in 1306 (we should all be remembered as long): “But not all [the arts] have been found; we shall never see an end of finding them … and new ones are being found all the time.”
DBx: Julian Simon would agree.