Nature shows that with the growth of intelligence comes increased capacity for pain, and it is only with the highest degree of intelligence that suffering reaches its supreme point.
They who go Feel not the pain of parting; it is they Who stay behind that suffer.
After great pain, a formal feeling comes. The Nerves sit ceremonious, like tombs.
Evil being the root of mystery, pain is the root of knowledge.
A beautiful thing never gives so much pain as does failing to hear and see it.
The mind conceives with pain, but it brings forth with delight.
Do something every day that you don't want to do. This is the golden rule for acquiring the habit of doing your duty without pain.