It is not the biggest, the brightest or the best that will survive, but those who adapt the quickest.

We will now discuss in a little more detail the Struggle for Existence.

It is a truly wonderful fact - the wonder of which we are apt to overlook from familiarity - that all animals and all plants throughout all time and space should be related to each other in group subordinate to group.

We cannot fathom the marvelous complexity of an organic being; but on the hypothesis here advanced this complexity is much increased. Each living creature must be looked at as a microcosm--a little universe, formed of a host of self-propagating organisms, inconceivably minute and as numerous as the stars in heaven.

Farewell Australia! You ... are too great and ambitious for affection, yet not great enough for respect. I leave your shores without sorrow or regret.

Besides love and sympathy, animals exhibit other qualities connected with the social instincts which in us would be called moral.

Wherever the European has trod, death seems to pursue the aboriginal.