Philosophy, Ethics.

Spinoza considered The Ethics his chief project and philosophical legacy. The work has been associated with that of Leibniz and René Descartes as part of the rationalist school of thought, which includes the assumption that ideas correspond to reality perfectly, in the same way that mathematics is supposed to be an exact representation of the world. The Ethics, a "superbly cryptic masterwork", contains many unresolved obscurities and is written with a forbidding mathematical structure modeled on Euclid's geometry. The writings of René Descartes have been described as "Spinoza's starting point". Spinoza's first publication was his 1663 geometric exposition of proofs using Euclid's model with definitions and axioms of Descartes's Principles of Philosophy. Following Descartes, Spinoza aimed to understand truth through logical deductions from 'clear and distinct ideas', a process which always begins from the 'self-evident truths' of axioms. However, his actual project does not end there: from his first work to his last, there runs a thread of "attending to the highest good" (which also is the highest truth) and thereby achieving a state of peace and harmony, either metaphysically or politically. In this light, the Principles of Philosophy might be viewed as an "exercise in geometric method and philosophy", paving the way for numerous concepts and conclusions that would define his philosophy.