Be courageous! Have faith! Go forward.
Be brave as your fathers before you. Have faith and go forward.
If we did all the things we are capable of doing, we would literally astound ourselves.
Discontent is the first necessity of progress.
I am both pleased but astonished by the fact that mankind has not yet begun to use all the means and devices that are available for destruction. I hope that such weapons are never manufactured in quantity.
Being busy does not always mean real work.