A quote by Michel de Montaigne

Je suis, j'existe: cela est certain; mais combien de temps? A savoir, autant de temps que je pense; car peut-être se pourrait-il faire, si je cessais de penser, que je cesserais en même temps d'être ou d'exister.

When I began to talk with him, I could not help thinking that he was not really wise, although he was thought wise by many, and still wiser by himself; and thereupon I tried to explain to him that he thought himself wise, but was not really wise; and the consequence was that he hated me,

Just to make sure that I have not been learning solely for my own benefit today, let me share with you three fine quotations I have come across, each concerned with something like the same idea – one of them is by way of payment of the usual debt so far as this letter is concerned, and the other two you are to regard as an advance on account. ‘To m