The only defense against the world is a thorough knowledge of it.
Was vernünftig ist， das ist Wirklich； und was wirklich ist，das ist vernünftig.
Every landscape is a state of mind.
在瞬息万变的全球市场中，适应性是关键。
Take everything you like seriously, except yourselves.
When I approach a child, he inspires in me two sentiments; tenderness for what he is, and respect for what he may become.
最好的书会提出问题，而不仅仅是给出答案。