Aristotle (384-322) BC - Greek Philosopher

1. We make war that we may live in peace. (Nicomachean Ethics bk. 10)

2. Man is by nature a political animal. (Politics bk. 1, 1253 a 2 3)

3. Probable impossibilities are to be preferred to improbable possibilities. (Poetics ch. 24, 1460a 26 7)

Quotations

I am agree with  Socrates (469-399 BC) : "I know nothing expect the face of my ignorance."