Regarding sex education: no secrets!
The flag is a symbol of the fact that man is still a herd animal.
Whether or not you can observe a thing depends upon the theory you use. It is the theory which decides what can be observed.
Strive not to be a success, but rather to be of value.
Curiosity has its own reason for existence.
We must learn the difficult lesson that the future of Mankind will only be tolerable when our course, in world affairs as in others, is based upon justice and law rather than the threat of naked power.