To every action there is an equal and opposite reaction.
No great discovery was ever made without a bold guess.
Tact is the knack of making a point without making an enemy.
- Galileo Galilei Italian Astronomer
- Stephen Hawking English Theoretical Physicist
- John Herschel English Mathematician
- Max Planck German Physicist
- Francis Bacon English Philosopher
- Roger Bacon English Philosopher
- Niels Bohr Danish Physicist
- Richard Feynman American Physicist
- Alfred North Whitehead English Mathematician
- Werner Heisenberg German Theoretical Physicist