He must protect the lives and interests of the people, appeal to his fellow citizens' patriotic interests, and, in general, set the welfare of the co… - Cicero

Mala enim et impia consuetudo est contra deos disputandi, sive ex animo id fit sive simulate.

Now since perturbations of mind create misery, while quietness of mind makes life happy, and since there are two kinds of perturbations, grief and fear having their scope in imagined evils, inordinate joy and desire in mistaken notions of the good, all being repugnant to wise counsel and reason, will you hesitate to call him happy whom you see relieved, released, free from these excitements so oppressive, and so at variance and divided among themselves? Indeed one thus disposed is always happy. Therefore the wise man is always happy.

what shall I do with Diodotus the Stoic, whose pupil I have been from a boy, who has been my associate for so many years, who lives in my house, whom I both admire and love, and who despises the doctrines of Antiochus that you are putting forward? ‘Our doctrines,’ you will say, ‘are the only true ones.’ If they are true, certainly they are the only true ones, for there cannot be several true systems disagreeing with one another. Then is it we that are shameless, who do not wish to make a slip, or they presumptuous, who have persuaded themselves that they alone know everything?