"I do not know whether there are gods, but there ought to be"

Diogenes' quote recommends that he is unsure whether gods exist, but he thinks that they should. This could be interpreted as a require morality and justice on the planet. Diogenes may be recommending that, even if gods do not exist, individuals need to still make every effort to live ethical and simply lives. He may be suggesting that, even if gods do not exist, individuals ought to still strive to do what is best and just. This could be viewed as a call for people to take responsibility for their own actions and to be accountable for their own morality. It could also be interpreted as a require individuals to be more thoughtful and understanding towards one another, no matter whether gods exist or not. Eventually, Diogenes' quote could be seen as a require individuals to be more mindful of their actions and to strive for justice and morality in the world.