Paracelsus.

email from Dawood:-

The Father of Toxicology

Dosis facit venenum.

The dose makes the poison.

 ""I am Theophrastus, and greater than those to whom you liken me; I am Theophrastus, and in addition I am monarcha medicorum and I can prove to you what you cannot prove...I need not don a coat of mail or a buckler against you, for you are not learned or experienced enough to refute even a word of mine...As for you, you can defend your kingdom with belly-crawling and flattery. How long do you think this will last?...Let me tell you this: every little hair on my neck knows more than you and all your scribes, and my shoe buckles are more learned than your Galen and Avicenna, and my beard has more experience than all your high colleges. ""

Dosis facit venenum.

The dose makes the poison.

—Paracelsus, Selected Writings ^[27]

^PS

^1. Paracelsus (/ˌpærəˈsɛlsəs/;  was born Philippus Aureolus Theophrastus Bombastus von Hohenheim, on the 11 November or 17 December 1493 – 24 . This gave the word 'Bombastic' to English literature.

^{2. Then we have Cassius Clay - Mohamed Ali, the boxer, utter the famous quip ' Man, I am the Greatest'.}

^{Philip G V}