Never complain and never explain.
The dog that trots about finds a bone.
You never know what motivates you.
The secret of getting ahead is getting started.
If you've got a talent, protect it.
To know oneself, one should assert oneself.
Who seeks shall find.
If you're going through hell, keep going.
The wise does at once what the fool does at last.
Things do not happen. Things are made to happen.
The grounding in natural sciences which I obtained in the course of my medical studies, including preliminary examinations in botany, zoology, physics, and chemistry, was to become decisive in determining the trend of my literary work.