If you want to make an apple pie from scratch, you must first create the universe. (Carl Sagan)

The fundamental cause of trouble in the world is that the stupid are cocksure while the intelligent are full of doubt. (Bertrand Russell)

You can avoid reality, but you cannot avoid the consequences of avoiding reality. (Ayn Rand)

It is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring. (Carl Sagan)

Do, or do not.There is no ‘try’. (Yoda)