Good health is part of prosperity.
Prosperity includes good health as well as wealth. I watched the latest UK Dragons Den episode on the internet where budding business people ask for investment from angel investors, the Dragons; one entrepreneur looked sick, he had been working over a hundred hours a week on his business at the expense of his health.
Most people use their body like everything else in nature, an exploitable commodity consumed without regard to the damage the actions cause. If you have good health this is a blessing, but sickness or disability results in doors of opportunity closing on you. I read a blog post just now where the writer suffers from cancer; the dark cloud of death was one result of cancer, but also loss of job, and medical bills leading to the stress of serious financial troubles.
Cancer is the result of two key factors. The first factor is the rebel cell who in its hubris thinks it is better than the rest of the body and carves out its own territory in the body as a tumour. These cancer cells happen all the time, the individual who abuses or misuses their body increase the number of rebel cells, which dramatically increases the chances of a fully blown cancer. The second factor is a weak immune system which fails to recognise the cancer cells to destroy them. Abusing and misusing the body means undermining the immune system weakening its ability to recognise cancer cells. Cancer is a lottery, where you can increase or decrease your chances of getting cancer by the choices you make in life: smoking increases chances of cancer, eating cancer-killing berries decreases chances.
It takes fewer resources to prevent sickness than to cure it. If you are sick then you are digging a hole of significant troubles. I am self-employed, I cannot afford sickness, so I avoid alcohol, smoking and eat tons of fruit. I am far from perfect, but I invest in my health through prevention rather than cure.