Thoughts are no more than electrical surges in the brain. Sexual arousal is no more than a flow of chemicals to certain nerve endings. Sadness is no more than a bit of acid transfixed in the cerebellum. In short, the body is a machine, subject to the same laws of electricity and mechanics as an electron or clock.
But it is a melancholy of mine own, compounded of many simples, extracted from many objects, and indeed the sundry contemplation of my travels, which, by often rumination, wraps me in the most humorous sadness.
What is "this drive"? It's the tendency to not simply accept things as they are but to want to think about them, to understand them. To not be content to simply feel sad but to ask what sadness means. To not just get a bus pass but to think about the economic reasons getting a bus pass makes sense. I call this tendency the intellectual.
On Man, on Nature, and on Human Life, Musing in solitude, I oft perceive Fair trains of images before me rise, Accompanied by feelings of delight Pure, or with no unpleasing sadness mixed.
When we feel sad, all we need to do is to count our blessings, no matter how few we notice, so we can feel grateful for what we have been given. Sadness soon disappears and, in return, we get inspired to bless others.
If you wish to experience peace, provide peace for another. If you wish to know that you are safe, cause another to know that they are safe. If you wish to better understand seemingly incomprehensible things, help another to better understand. If you wish to heal your own sadness or anger, seek to heal the sadness or anger of another.
She was sad with an obscure sadness of which she had not the secret herself. There was in her whole person the stupor of a life ended but never commenced.