Chap. 6.] Ideas of Imagination & Ideas of Memory. 443 



efcape ordinary perfons. When a mind is mere con- 

 verfant, and more affected with the relation of caufei 

 and effect, fuch will conftitute a genius for the fciences* 

 A genius for the arts is more forcibly ftruck with the- 

 relation of refemblance. 



Hence, firft, it follows, that the memory rriuft be 

 ftrong to fupply a genius for either arts or fciences' 

 with materials for new improvements ; and, 2dly, The 

 mind muft be active, and eafily affected by the feveral 

 relations. 



The diftindtion between ideas of memory and ideas 

 of imagination has been already mentioned. Ideas of 

 memory muft neceffarily be more lively than ideas of 

 imagination commonly are at firft. Ideas of imagina- 

 tion are only formed from the ideas of memory, fo that 

 at moft the figure is but at fecond- hand, and muft alfa 

 be lefs perfect than what nature has actually prefented 

 to our fenfes. Yet, if we remember what was faid 

 refpecting the frequent repetition of an idea, it will be 

 found, that ideas of imagination may, by this means, 

 become fully as vivid as ideas of memory, which is the 

 cafe with perfons addicted to falfhood, as has been 

 already remarked. But I will even go beyond this, 

 and aflert, that a number of vivid ideas, being com- 

 bined into one complex one, and each having its 

 dependant train of ideas, the complex, or rather de- 

 complex idea, by frequent repetition, will produce a 

 ftronger fenfation than any one of its conftituent parts. 

 Hence it is a felf-evident fact, that the intellectual 

 pleafures and pains, though deducible from the fen- 

 fible ones, are in reality ftronger and more vivid, as 

 any perfbn may fatisfy himfelf who confiders a little 

 the nature of avarice, ambition, or love. 



It has been cuftomary to eftablifh a radical diftinc- 



tion between invention and judgment, as if they were 



6 diftind 



