Ability Quote by Joan Bennett Kennedy

Philosophy is doubt

— Michel De Montaigne

Unless you believe in what will succeed, you will never succeed in what you believe

— Gabe-Oji Deklerk

The great benefit of philosophy, which is also its great weakness, is that all its steps are taken in the spirit of doubt.

— Roger Scruton

Mere philosophy will not satisfy us. We cannot reach the goal by mere words alone. Without practice, nothing can be achieved. (3)

— Anonymous

A philosophy that begins in doubt assails what no-one believes, and invites us to nothing believable

— Roger Scruton

Philosophy seems to me on the whole a rather hopeless business.

— Bertrand Russell

I can't live my life under the sort of "I cannot fail" philosophy, because then every time I do fail, which feels more inevitable…

— Damon Lindelof

Doubt is probably the biggest obstacle to overcome. Once you rise above doubt, you are on your way to success.

— Theo Rossi

It's not what we don't know that prevents us from succeeding; it's what we know that just ain't so that is our greatest obstacle.

— Josh Billings

All the progress we have made in philosophy ... is the result of that methodical skepticism which is the element of human freedom.

— Charles Sanders Peirce

You can succeed if nobody else believes it, but you will never succeed if you don't believe in yourself.

— William J. H. Boetcker

If you doubt you can accomplish something, then you can't accomplish it. You have to have confidence in your ability, and then be tough…

— Rosalynn Carter