Our observation of nature must be diligent, our reflection profound, and our experiments exact. We rarely see these three means combined; and for this reason, creative geniuses are not common.
Gratitude is a burden, and every burden is made to be shaken off.
Every man has his dignity. I'm willing to forget mine, but at my own discretion and not when someone else tells me to.
Only passions, great passions can elevate the soul to great things.