I would give absolutely nothing for the theory of Natural Selection, if it requires miraculous additions at any one stage of descent.

You will be astonished to find how the whole mental disposition of your children changes with advancing years. A young child and the same when nearly grown, sometimes differ almost as much as do a caterpillar and butterfly.

The moral faculties are generally and justly esteemed as of higher value than the intellectual powers.

This preservation of favourable variations and the destruction of injurious variations, I call Natural Selection, or the Survival of the Fittest. Variations neither useful nor injurious would not be affected by natural selection and would be left a fluctuating element.

Light may be shed on man and his origins.

Hence, a traveller should be a botanist, for in all views plants form the chief embellishment.

I am a firm believer, that without speculation there is no good and original observation.