Curcumin is not related to cumin which is a spice made from the seeds of a different plant. Turmeric has been used for headaches, migraine and joint pain, as well as for other conditions. Turmeric is LIKELY SAFE when used appropriately by adults. *Stomach upset, nausea, dizziness or diarrhea. Stop turmeric if you have any of these side effects.
However, it is now accepted that not only were the 'story' elements of the narrative 'fiction', but that the 'facts' on which Haley based is story were also not true-i.e. that the whole story was fiction from beginning to end.
It is an old proverb, it is in many languages and cultures. There is not real record of the original speaker. And because it exists in many cultures, we don't even know the true country or origin. Many writers have been quoted as being the source of this or similar quotes, but in truth it predates all of them.