and PaJJionSy upon the Vnderjlanding. 385 
than fuch a degree of memory , as to keep in view 
the fteps of the procefs, and fo much undemand¬ 
ing, as to be able to apply the plaineft axioms s 
and to fee the truth of demonjlration. Surely, no 
great exertion or exaltation of mind is necefiary 
to this. You would not call that a fuperior/pint, 
which v/as able to fee, with infallible certainty, 
truths, of which, when properly underftood, it 
is impoftible to doubt. 
Here, we grant, high degrees of imagination, 
fenftbility, tafte, are not neceftary. A mind, which 
could not fee the certainty of fuch conclufions, if 
able to trace, and to remember the fteps by 
which it had proceeded, would hardly deferve 
to be called rational. 
Thofe, certainly, are the greateft and nollefi 
fpirits, who can exert the whole ccllefted powers 
of their minds, upon the contemplation of 
important fubje&s, and determine, with clear- 
nels and truth, where the evidence is not fo 
irrefiftible, as that the conclufion cannot 
poftibly be miftaken. The moft common , the 
mo ft important, the great eft fubjedts which can 
come before the human mind, are not capable 
of demonflrative evidence. Yet, they have 
evidence of a peculiar kind, which can only 
be diicerned, in its full proportion, by a mind, 
properly prepared to receive ir. Befides me¬ 
mory and underftanding, you muft call in other 
Vo l. I. C c powers. 
