venial sin against nature, what a mortal sin against nature? The answers
are less easy to reach than the theologians' answers generally were, but
we can at least put ourselves in the right attitude; we may succeed in
asking that question which is sometimes even more than the half of
knowledge.

It is perhaps a mistake to show so plainly at the outset that I approach
what may seem only a psychological question not without moral fervour. But
I do not wish any mistake to be made. I regard sex as the central problem
of life. And now that the problem of religion has practically been
settled, and that the problem of labor has at least been placed on a
practical foundation, the question of sex--with the racial questions that
rest on it--stands before the coming generations as the chief problem for
solution. Sex lies at the root of life, and we can never learn to
reverence life until we know how to understand sex.--So, at least, it
seems to me.

Having said so much, I will try to present such results as I have to
record in that cold and dry light through which alone the goal of
knowledge may truly be seen.

HAVELOCK ELLIS.

July, 1897.




PREFACE TO THE THIRD EDITION.