74 Dr. Barnes on the Affinity 
and vigour to every part of the mental frame. 
The continual, folitary play of one particular 
limb, may give ftrength and dexterity to the 
mufcles connedted with that limb; but the pro¬ 
bable confequence will be, awkwardnefs and 
imbecility in all thofe, which are not brought into 
action. The mere mathematician, the mere 
grammarian, or the mere any thing , may, perhaps, 
with microfcopic eye, fee one little object very 
diftindtly. But, if not accuftomed to look 
around him to a wider range of vifion, his view' 
will be narrow, and, when he turns from that 
lucid point, he will be enveloped with darknefs. 
It is, indeed, impofllble for the man, whofe 
mind has not been expanded by fome love of 
general knowledge, to appreciate the feveral 
fciences, according to their juft value, and to 
affign to each their proportionable (hare of efteem 
and confequence. If Monfieur Veftris com- 
prife all human excellence in dancing: if 
another man look down, with fupreme contempt, 
upon every perfon, who has not plunged into 
the depths of mathematical, or metaphyfical myf- 
teries, what is the caufe ? Is it not, the want of 
fome acquaintance with other fciences ? This 
would have enabled him, to range the different 
branches of knowledge in their proper order, 
and to apportion to each, their proper fhare of 
attention and regard. 
But 
