PART 24
And, as has been formerly stated, one ought to be acquainted with
the powers of juices, and what action each of them has upon man, and
their alliances towards one another. What I say is this: if a sweet
juice change to another kind, not from any admixture, but because
it has undergone a mutation within itself; what does it first become?-
bitter? salt? austere? or acid? I think acid. And hence, an acid juice
is the most improper of all things that can be administered in cases
in which a sweet juice is the most proper. Thus, if one should succeed
in his investigations of external things, he would be the better able
always to select the best; for that is best which is farthest removed
from that which is unwholesome.