It is not clear that intelligence has any long-term survival value. Stephen Hawking
Though it might be nice to imagine there once was a time when man lived in harmony with nature, it's not clear that he ever really did. Elizabeth Kolbert
Reading someone else's newspaper is like sleeping with someone else's wife. Nothing seems to be precisely in the right place, and when you find what you are looking for, it is not clear then how to respond to it. Malcolm Bradbury
Explanations are clear but since no one to whom a thing is explained can connect the explanations with what is really clear, therefore clear explanations are not clear. Gertrude Stein
When the character of a man is not clear to you, look at his friends. Japanese Proverb
When the character of a man is not clear to you, look at his friends. Haitian Proverb