We are kept keen on the grindstone of pain and necessity.

It is a law of nature we overlook, that intellectual versatility is the compensation for change, danger, and trouble. An animal perfectly in harmony with its environment is a perfect mechanism. Nature never appeals to intelligence until habit and instinct are useless. There is no intelligence where there is no change and no need of change. Only those animals partake of intelligence that have a huge variety of needs and dangers.

It is when suffering finds a voice and
sets our nerves quivering that this pity comes troubling us.

He preacheth patience that never knew pain

Without first realizing anything is possible, you can't begin to dream for change.

We first make our habits, then our habits make us.