Currently reading: Ethics by Benedict de Spinoza 📚
Reading this classic once again, love the approach used to tackle Cartesian mind / body dualism:
To be able not to exist is to lack power, and conversely, to be able to exist is to have power (as is known through itself). So, if what now necessarily exists are only finite beings, then finite beings are more powerful than an absolutely infinite Being. But this, as is known through itself is absurd. So either nothing exists or an absolutely infinite Being also exists. But we exist, either in ourselves, or in something else, which necessarily exists. Therefore an absolutely infinite Being - that is, God - necessarily exists.