On the Improvement of Understanding

ractatus de Intellectus Emendatione, or On The Improvement Of The Understanding, is a seventeenth-century unfinished work of philosophy by the 17th century philosopher Baruch Spinoza. The Tractatus was first published in 1677, the year of Spinoza's death, by some of his closest friends, along with other works including the Ethica and the Tractatus Politicus. The Tractatus 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.