"We gain strength, and courage, and confidence by each experience in which we really stop to look fear in the face...we must do that which we think we cannot." - Eleanor Roosevelt
Answer:
Voltaire
Explanation:
Well it can't be John Lock, he is known for Natural Rights, Purpose of Gov't and Social Contract.
It can't be Newton and I don't know who Kant is, so Voltaire would be your best bet.
