The book of Nature is that which the physician must read; and to do so he must walk over the leaves.

Let no one who can be his own belong to another.

Time is a brisk wind, for each hour it brings something new... but who can understand and measure its sharp breath, its mystery and its design?

All things are poisons. It is simply the dose that distinguishes between a poison and a remedy.

The physician must give heed to the region in which the patient lives, that is to say, to its type and peculiarities.

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.

Poison is in everything, and no thing is without poison. The dosage makes it either a poison or a remedy.