PREFACE. 
 X 
done something, if not towards directly effecting 
that object, at least towards opening the way 
for subsequent endeavours. If he has not sue- 
ceeded in putting all his propositions in a clear 
light, and finally settling the various contro- 
verted questions which he brings under review, 
yet he may hope that he has introduced them 
in such a manner as will excite in others the 
interest and attention requisite for their ultj- 
mate determination. Free, on his own part, 
from particular attachment to any of the po- 
sitions which he has maintained, although im- 
pressed with that clear conviction of their 
soundness, without which it would be absurd 
to intrude them on public notice; and sensible 
of the thousand ways in which error imposes 
itself on the understanding in the character of 
truth, he will be glad of an opportunity of re- 
considering his opinions, under the guidance of 
2 mind which has reached a higher point of