The book of Nature is that which the physician must read; and to do so he must walk over the leaves.
What the eyes perceive in herbs or stones or trees is not yet a remedy; the eyes see only the dross.
The physician must give heed to the region in which the patient lives, that is to say, to its type and peculiarities.
Could we but rightly comprehend the mind of man, nothing would be impossible to us upon the earth.
Since nothing is so secret or hidden that it cannot be revealed, everything depends on the discovery of those things that manifest the hidden.
Time is a brisk wind, for each hour it brings something new.
All arts lie in man, though not all are apparent. Awakening brings them out. To be taught is nothing; everything is in man waiting to be awakened.
Many have said of Alchemy, that it is for the making of gold and silver. For me such is not the aim, but to consider only what virtue and power may lie in medicines.
This process is alchemy: its founder is the smith Vulcan.
The dose makes the poison.
As you talk, so is your heart.
Thoughts create a new heaven, a new firmament, a new source of energy, from which new arts flow.
For one country is different from another; its earth is different, as are its stones, wines, bread, meat, and everything that grows and thrives in a specific region.
For it is we who must pray for our daily bread, and if He grants it to us, it is only through our labour, our skill and preparation.
All drugs are poisons; the benefit depends on the dosage.
The interpretation of dreams is a great art.
The dreams which reveal the supernatural are promises and messages that God sends us directly: they are nothing but His angels, His ministering spirits, who usually appear to us when we are in a great predicament.
Consider that we shouldn’t call our brother a fool, since we don’t know ourselves what we are.
If we want to make a statement about a man’s nature on the basis of his physiognomy, we must take everything into account; it is in his distress that a man is tested, for then his nature is revealed.
A mortal lives not through that breath that flows in and that flows out. The source of his life is another and this causes the breath to flow.