122 
immediately to those 
among 
the 
students, 
who 
have made 
SO 
much 
P1'0g'ress 
in 
art, 
t0 
be 
masters of the human figure, of perspective, and 
of those other parts of study, which I have 
heretofore 
recommend ed 
3S 
the 
elements 
of 
painting 
and 
sculpture ; 
and who 
are therefore 
about to enter on the higher paths of professional 
excellence. It will consequently be my object, 
now, to show how that excellence is to be 
attained ; 
and 
this will 
best 
be 
done, 
HS 
COH- 
ceive, 
by showing 
how it 
has 
been 
attained by 
others, 
in whom 
that 
excellence has been most 
distinguished 
in 
the ancient and modern world. 
By pursuing the principles on which they moved, 
You 
have 
the 
best 
enc0u1'a.g'ementA 
in 
their 
illustrious example, while, by neglecting those 
principles, you can have no more reason to hope 
for such su_cc,es_s as they met with, than you can 
think of reachping a, distant land, without road 
or compass. to direct your steps. 
" The ground which I shall propose for your 
attention is thisl- to investigate those philo- 
sophical principles oncwhich all truth. of cha- 
Tuber 
is 
fnunded, 
arid 
by which 
that 
sublime