This library is built in the open.
If you spot an error, have a suggestion, or just want to say hello — we’d love to hear from you.

Of human faculties in general, you will find that each is unable to contemplate itself, and therefore to approve or disapprove itself. How far does the proper sphere of grammar extend? As far as the judging of language. Of music? As far as the judging of melody. Does either of them contemplate itself, then? By no means.
Thus, for instance, when you are to write to your friend, grammar will tell you what to write; but whether you are to write to your friend at all, or not, grammar will not tell you. Thus music, with regard to tunes; but whether it be proper or improper, at any particular time, to sing or play, music will not tell you.