Montesquieu
 

XXIV.8 On the harmony of moral laws with those of religion

In a coun­try which has the mis­for­tune of having a reli­gion that did not come from God, it is still neces­sary for it to accord with mora­lity, because reli­gion, even if false, is the best assu­rance men can have of their pro­bity.

The prin­ci­pal points of the reli­gion of the peo­ple of Pegu1 are not to kill, not to steal, to avoid immo­desty, never to dis­please one’s neigh­bor, and to do him on the contrary all the good one can. With that they believe you will be saved in any reli­gion what­soe­ver : for which rea­son these peo­ples, although proud and poor, are gentle and com­pas­sio­nate toward the unfor­tu­nate.

Recueil des voyages qui ont servi à l’établissement de la Compagnie des Indes, vol. III, part I, p. 63.