A sense of power is the most intoxicating stimulant a mortal can enjoy.

I am succeeding quite well in my work and the future looks well. What special mission is God preparing me for? Cutting off all earthly ties and isolating me as it were.

It is cowardly to fly from natural duties and take up those that suit our taste or temperament better; but it is also unwise to take an exaggerated view of personal duties, which shuts out the proper care of the mind and body entrusted to us.

I often think that all the difficulties we encounter only give us the more strength if we keep hold of our work, and we must not now give up while in the prime of life. It is best to keep trying, and by and by the opportunity will come. If we have given up, then we shall not be ready for it when it does come.

Subject the material world to the higher ends by understanding it in all its relations to daily life and action.

...all enjoyment is dependent upon the frailty of human life and human desires ... if we were to have all we want and to live forever, all enjoyment would be gone.

For this knowledge of right living, we have sought a new name... . As theology is the science of religious life, and biology the science of [physical] life ... so let Oekology be henceforth the science of [our] normal lives ... the worthiest of all the applied sciences which teaches the principles on which to found... healthy... and happy life.