Since nothing is so secret or hidden that it cannot be revealed, everything depends on the discovery of those things that manifest the hidden.

Know that the philosopher has power over the stars, and not the stars over him.

That which lives on reason lives against the spirit.

The art of medicine has its roots in the heart.

Then God sends us such a messenger who appears to us in spirit, warns us, consoles us, teaches us, and brings us His good tidings.

But is not He who created it for the sake of the sick body more than the remedy? And is not He who cures the soul, which is more than the body, greater?

It should be forbidden and severely punished to remove cancer by cutting, burning, cautery, and other fiendish tortures. It is from nature that the disease comes, and from nature comes the cure, not from physicians.