People are like bicycles. They can keep their balance only as long as they keep moving.
One is born into a herd of buffaloes and must be glad if one is not trampled under foot before one's time.
Without deep reflection one knows from daily life that one exists for other people.
An empty stomach is not a good political adviser.
Strive not to be a success, but rather to be of value.
Physics is an attempt conceptually to grasp reality as something that is considered to be independent of its being observed. In this sense one speaks of physical reality.