Problems are not stop signs, they are guidelines.
Never complain and never explain.
You never know what motivates you.
Quality is not an act, it is a habit.
Wherever you are - be all there.
Be kind whenever possible. It is always possible.
Leap, and the net will appear.
If you think you can do it, you can.
The most effective way to do it, is to do it.
Be gentle to all and stern with yourself.
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.