Do not weep do not wax indignant. Understand.
If you're going through hell, keep going.
Be gentle to all and stern with yourself.
You never know what motivates you.
What you do today can improve all your tomorrows.
The wise does at once what the fool does at last.
The secret of getting ahead is getting started.
Well done is better than well said.
After a storm comes a calm.
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.