"Between understanding and faith immediate connections must subsist."

"The imagination is the spur of delights... all depends upon it, it is the mainspring of everything now, is it not by means of the imagination one knows joy? Is it not of the imagination that the sharpest pleasures arise?"

"Nature, who for the perfect maintenance of the laws of her general equilibrium, has sometimes need of vices and sometimes of virtues, inspires now this impulse, now that one, in accordance with what she requires."

"Your body is the church where Nature asks to be reverenced."

"Name the greatest of all the inventors: Accident."

"I'm very lucky. I'm very fortunate that my books have never gone out of print - none of them."

"We need creativity in order to break free from the temporary structures that have been set up by a particular sequence of experience."

"No one would talk much in society if they knew how often they misunderstood others."