On the first of these Professor Huxley throws no light whatever; whilst as to the second, it really hangs entirely on the very point that he cited as indifferent.

We must have some knowledge, even though it be only vague and negative, of the nature of a food, before we know whether it will be well for us in the long run to habitually eat it, or to abstain from it.
Let us apply this illustration to love.

Professor Huxley's ginger shall stand for the sort of love he would most approve of; and love, as a whole, will be represented by a varied dessert, of which ginger is one of the dishes.

Now what Professor Huxley has to do is to recommend this ginger, and to show that it is divided by an infinite gulf--say from prunes or from Huntley and Palmer's biscuits.

But how is he to do this?
To say that ginger is hot is to say nothing.