The basic rules of Alchemy:

1: All is from One

2. Polarity

The four main elemts: Fire, Water, Air, Earth

The three Essentials: Salt, Mercury, and Sulfur

Alchemists are scientist. So they don't believe in an uncertain existence like God. Isn't it ironic that people like us are closest to God? 

Water, 35 litres. Carbon, 20kg. Ammonia, 4 litres. Lime, 1.5kg. Phosperus, 800g. Salt, 250 g. Niter, 100g. Sulphur, 80g. Fluorine, 7.5g. Iron, 5g. Silicon 3g. And fifteen other elements. Those are the elements to make an average adult human body. You can buy these elemental ingredients at the market with the pocket money of a child. Humans are made so cheaply. 

The 3 stages of Alchemy consist of:

1. Construction

2. Deconstruction

3. Reconstruction

The point Im getting at is, your human boody is but a husk composed of smple household ingrediants. But, what you make of your life is immeasuarable.