Do not weep do not wax indignant. Understand.
If you think you can do it, you can.
Problems are not stop signs, they are guidelines.
The dog that trots about finds a bone.
What you do today can improve all your tomorrows.
To know oneself, one should assert oneself.
Leap, and the net will appear.
It's always too early to quit.
The secret of getting ahead is getting started.
Know or listen to those who know.
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.