Use your power to form opinions with care and respect. This power is everything. Make sure your opinions don't create thoughts that go against nature or against what it means to be a thinking person. The goal of being rational is simple: don't act rashly, be kind to people, and accept whatever the gods send your way. Put aside everything else and focus on these few things. Remember that no one truly lives longer than this present moment, which is just a brief instant.
Use thine opinative faculty with all honour and respect, for in her indeed is all: that thy opinion do not beget in thy understanding anything contrary to either nature, or the proper constitution of a rational creature. The end and object of a rational constitution is, to do nothing rashly, to be kindly affected towards men, and in all things willingly to submit unto the gods. Casting therefore all other things aside, keep thyself to these few, and remember withal that no man properly can be said to live more than that which is now present, which is but a moment of time.