Mankind will never see an end of trouble until... lovers of wisdom come to hold political power, or the holders of power... become lovers of wisdom.

This line comes from Plato’s dialogue the Republic, in the midst of Socrates’ argument that justice in the city depends on the proper ordering of its classes and the rule of knowledge rather than appetite or ambition. In Books V–VII, Plato introduces the controversial proposal that philosophers—those trained to grasp the Forms and especially the Form of the Good—must rule, or else rulers must genuinely become philosophers. The remark reflects the political turmoil of late fifth- and early fourth-century Athens (war, faction, demagoguery) and Plato’s own disillusionment with ordinary politics after the execution of Socrates.

Plato claims that political life will remain plagued by “troubles” so long as power is pursued without wisdom. The quote expresses the core ideal of the philosopher-king: legitimate rule requires knowledge of what is truly good for the whole community, not merely skill at persuasion or the pursuit of private advantage. It also implies that philosophy is not an ivory-tower activity; it has public consequences, because ignorance at the top produces systemic injustice. The conditional form—either philosophers become rulers or rulers become philosophers—underscores that the remedy is a union of authority and genuine understanding.

1) “Until philosophers are kings, or the kings and princes of this world have the spirit and power of philosophy… cities will never have rest from their evils.”
2) “There will be no end to the troubles of states… until philosophers become rulers or rulers become philosophers.”
3) “The human race will not be free of evils until either philosophers rule as kings or those now called kings and rulers genuinely and adequately philosophize.”