Tractatus de Intellectus Emendatione (Treatise on the Emendation of the Intellect) is an unfinished work of philosophy by the seventeenth-century philosopher Baruch Spinoza, published posthumously in 1677.

[1] It is an attempt to formulate a philosophical method that would allow the mind to form the clear and distinct ideas that are necessary for its perfection.

It contains, in addition, reflection upon the various kinds of knowledge, an extended treatment of definition, and a lengthy analysis of the nature and causes of doubt.

Spinoza commenced this treatise with the intention of examining the problem of knowledge, but the work was never completed.

On the other hand, the highest expression of willing is experienced in that striving for consistency and harmony which is so characteristic of reason.