Great spirits have and will always encountered violent opposition from mediocre minds.
Your imagination is more important than the knowledge you possess.
Life is like riding a bicycle, in order to keep your balance, you must keep moving.
Common sense is often just a collection of prejudices you acquired by age eighteen.
Whoever is careless with the truth in small matters cannot be trusted with important matters.
Everyone is a genius, but if you judge a fish on its ability to climb a tree, it will live its whole life believing it is stupid.