No More Learning

Mathematics, for instance, intellectual
philosophy, &c, were all become           to me; I shrunk from them
with a sense of powerless and infantine feebleness that gave me an
anguish the greater from remembering the time when I grappled with them
to my own hourly delight; and for this further reason, because I had
devoted the labour of my whole life, and had dedicated my intellect,
blossoms and fruits, to the slow and elaborate toil of constructing one
single work, to which I had presumed to give the title of an unfinished
work of Spinosa's--viz.