“Both oligarch and tyrant mistrust the people, and therefore deprive them of their arms.”
                                        
                                        Book V, 1311a.11 
Politics
                                    
“Both oligarch and tyrant mistrust the people, and therefore deprive them of their arms.”
                                        
                                        Book V, 1311a.11 
Politics
                                    
“The good citizen need not of necessity possess the virtue which makes a good man.”
                                        
                                        Book III, 1276b.34 
Politics
                                    
                                        
                                        Book II: On the soul; In:  Aristotle (1808). Works, Vol. 4. p. 63 (412a-424b) 
De Anima
                                    
“Change in all things is sweet.”
                                        
                                        Book VII, 14 
Remark: While this quote is known as Aristotle's, he did not propose it as his own saying, but as a citation from another author. The full text is: "But 'change in all things is sweet', as the poet says, because of some vice." 
Nicomachean Ethics
                                    
                                        
                                        Moreover, it has a beginning, a middle, and an end. 
I. 1. as translated by William Whewell and as quoted by Florian Cajori, A History of Physics in its Elementary Branches (1899) as Aristotle's proof that the world is perfect. 
On the Heavens
                                    
“Poetry demands a man with a special gift for it, or else one with a touch of madness in him.”
                                        
                                        1455a.33 
Poetics
                                    
                                        
                                        Book I, Part 25 
Also known as Occam's razor or the principle of parsimony / economy (lex parsimoniae) 
Richard McKeon (tr.) (1963), p. 150 
Posterior Analytics
                                    
“We must as second best, as people say, take the least of the evils.”
                                        
                                        Book II, 1109a.34 (cf. Nicomachean Ethics, 1131b: ἔστι γὰρ τὸ ἔλαττον κακὸν μᾶλλον αἱρετὸν τοῦ μείζονος [the lesser of two evils is more desirable than the greater]) 
Nicomachean Ethics