There is nothing more dreadful in the world than to live in somebody else’s house, eating his bread and doing nothing in return for it.
When you cease to make a contribution, you begin to die.
The worthwhile problems are the ones you can really solve or help solve, the ones you can really contribute something to.
It is my earnest desire that some of you should carry on this scientific work and keep for your ambition the determination to make a permanent contribution to science.
