Always follow these two rules: first, act only on what your reasoning mind proposes for the good of humanity, and second, change your opinion if someone shows you it's wrong. This change of mind must proceed only from the conviction that it's both correct and for the common good, but not because it will give you pleasure and make you popular.
Marcus AureliusGod sees the minds (ruling principles) of all men bared of the material vesture and rind and impurities. For with his intellectual part alone he touches the intelligence only which has flowed and been derived from himself into these bodies. And if thou also usest thyself to do this, thou wilt rid thyself of thy much trouble. For he who regards not the poor flesh which envelops him, surely will not trouble himself by looking after raiment and dwelling and fame and such like externals and show.
Marcus AureliusThe true joy of humankind is in doing that which is most proper to our nature; and the first property of people is to be kindly affected towards them that are of one kind with ourselves.
Marcus AureliusIt doesn't hurt me unless I interpret its happening as harmful to me. I can choose not to.
Marcus Aurelius