Either you run the day or the day runs you.
The wise does at once what the fool does at last.
If you're going through hell, keep going.
Always desire to learn something useful.
The dog that trots about finds a bone.
You never know what motivates you.
It's always too early to quit.
Never complain and never explain.
The most effective way to do it, is to do it.
Problems are not stop signs, they are guidelines.
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.