You never know what motivates you.
Quality is not an act, it is a habit.
It's always too early to quit.
Things do not happen. Things are made to happen.
Begin to be now what you will be hereafter.
Be gentle to all and stern with yourself.
Never complain and never explain.
Leap, and the net will appear.
Be thine own palace, or the world's thy jail.
The secret of getting ahead is getting started.
The initial motivation of the experiment which led to this discovery was a subconscious feeling for the inexhaustible wealth of nature, a wealth that goes far beyond the imagination of man.