Sect. XV. i. l. CLASSES OF IDEAS. 95 



SECT. XV. 



OF THE CLASSES OF IDEAS. 



I. I. Ideas received in tribes. 2. We combine them further, or ab- 

 filracl from thefe tribes. 3. Complex ideas. 4. Compounded 

 ideas. C. Simple ideas , modes , fubjlances , relations , general ideas, 

 6. Ideas of reflexion. *]. Memory and imagination imperfeclly 

 defined. Ideal prefence. Memorandum-rings. II. 1. Irrita- 

 tive ideas. Perception. 2. Senftive ideas, imagination. 3. 

 Voluntary ideas, recolleclion. 4. AJfociated ideas, fuggefiion. 

 III. 1. Definitions of perception, memory. 2. Reafoning, judge- 

 ment, doubting, dijhnguiffjing, comparing. 3. Invention. 4. 

 Confcioufnefs. 5. lndentity. 6. Lapfe of time. 7. Freewill. 



I. 1. As the conftituent elements of the material world are 

 only perceptible to our organs of fenfe in a ftate of combination j 

 it follows, that the ideas or fenfual motions excited by them, are* 

 jiever received fingly, but ever with a greater or lefs degree of 

 combination. So the colours of bodies or their hardneSes oc- 

 cur with their figures : every fmell and tafte has its degree of 

 pungency as well as its peculiar flavour : and each note in muiic 

 is combined with the tone of fome inftrument. It appears from 

 hence, that we can be fenfible of a number of ideas at the fame 

 time, fuch as the whitenefs, hardnefs, and coldnefs of a fnow- 

 bafl, and can experience at the fame time many irritative ideas 

 of furrounding bodies, which we do not attend to, as mentioned 

 in Section VII. 3. 2. But thofe ideas which belong to the fame 

 fenfe, feem to be more eafily combined into fynchronous tribes, 

 than thofe which were not received by the fame fenfe, as we 

 can more eafily think of the whitenefs and figure of a lump of 

 fugar at the fame time, than the whitenefs and fweetnefs of it. 



2. As thefe ideas, or fenfual motions, are thus excited with 

 greater or lefs degrees of combination ; fo we have a power, 

 when we repeat them either by our volition or fenfation, to in- 

 creafe or diminifli this degree of combination, that is, to form 

 compounded ideas from thofe, which were more fimple j and ab- 

 ftracl: ones from thofe, which were more complex, when they 

 were firft excited j that is, we can repeat a part or the whole of 

 thofe fenfual motions, which did conftitute our ideas of percep- 

 tion ; and the repetition of which now conftitutes our ideas ©f 

 recolleclion, or of imagination. 



3. Thofe ideas, which we repeat without change of the quan- 

 tity of that combination, with which we firft received them, are 



called 



