In part 4, we learn that cheerfulness cannot be excessive, though titillation can be excessive and bad.  
At the end of part 2 of this work, the author considers the example of Buridan's ass, and rather testily remarks that he doesn't know whether a creature in complete equilibrium would be an ass or a man, just as he doesn't know if a fool or a baby is to be considered a man.  In part 4, we learn that cheerfulness cannot be excessive, though titillation can be excessive and bad.  That part also contains the claim that a free man thinks of death least of all things, and his wisdom is a meditation of life, not of death.  In part 5, the author claims that nobody can hate God and that anyone who loves God cannot endeavor that God should love him in return, which follows from his views on the power of the intellect.  God is also the subject of the first book, in which the author introduces his slogan "God or Nature" and defines such terms as attribute, mode, and substance.  FTP, name this philosophical work first published in 1677, which uses the geometric method to discuss human freedom and bondage, a book by Baruch Spinoza.
At the end of part 2 of this work, the author considers the example of Buridan's ass, and rather testily remarks that he doesn't know whether a creature in complete equilibrium would be an ass or a man, just as he doesn't know if a fool or a baby is to be considered a man.  
the Ethics