By far the best proof is experience.

Atheism is rather in the lip, than in the heart of man.

For it is not possible to join serpentine wisdom with columbine innocence, except men know exactly all the conditions of the serpent: his baseness and going upon his belly, his volubility and lubricity, his envy and sting, and the rest; that is, all forms and natures of evil: for without this, virtue lieth open and unfenced.

My painting is not violent, it's life that is violent. Even within the most beautiful landscape, in the trees, under the leaves, the insects are eating each other; violence is a part of life. We are born with a scream; we come into life with a scream and maybe love is a mosquito net between the fear of living and the fear of death.

There are and can be only two ways of searching into and discovering truth. The one flies from the senses and particulars to the most general axioms, and from these principles, the truth of which it takes for settled and immovable, proceeds to judgment and to the discovery of middle axioms. And this way is now in fashion. The other derives axioms from the senses and particulars, rising by a gradual and unbroken ascent, so that it arrives at the most general axioms last of all. This is the true way, but as yet untried.

The inclination to goodness is imprinted deeply in the nature of man.

There is nothing more certain in nature than that it is impossible for any body to be utterly annihilated.