The only thing that stands between a man and what he wants from life is often merely the will to try it and the faith to believe that it is possible.
我已将这一原则——每一微小变异若有益便被保存——称为自然选择。
Illness is the night-side of life, a more onerous citizenship. Everyone who is born holds dual citizenship, in the kingdom of the well and in the kingdom of the sick.