"It belongs to the nature of substance to exist." (78)

"God - in others words a substance consisting of infinite attributes, each of which expresses eternal and infinite essence - necessarily exists." (82)

"Besides God no substance can exist or be conceived." (85)

"Thought is an attribute of God, or, God is a thinking thing." (114)

"Extension is an attribute of God, or, God is an extended thing." (115)

"Those things which are common to all things, and are equally in the part and in the whole, can only be conceived adequately." (145)

"The actions of the mind arise from adequate ideas alone, but passions depend on inadequate ideas alone." (169)

"Each thing, in so far as it is in itself, endeavors to preserve in its being." (171)

"Any thing can by accident be the cause of pleasure, pain or desire." (176)

"Human lack of power in controlling and restraining the emotions I call 'servitude'." (225)

"By good...