How does it feel to know all mathematics and all form can be represented in terms of the empty set. John Von Neumann helped verify an old teaching of Buddhism. That all form is inherently empty of any permanent existence.

0 = {} (empty set)
1 = {0} = { {} }
2 = {0,1} = { {}, { {} } }
3 = {0,1,2} = {{}, { {} }, { {}, { {} } }}
4 = {0,1,2,3} = { {}, { {} }, { {}, { {} } }, {{}, { {} }, { {}, { {} } }} }