Meditation 2.6-9
6. You are doing yourself violence, violence, my soul; and you will have no second occasion to do yourself honour. Brief is the life of each of us, and this of yours is nearly ended, and yet you do not reverence yourself, but commit your well-being to the charge of other men's souls.
7. Do things from outside break in to distract you? Give yourself a time of quiet to learn some new good thing and cease to wander out of your course. But, when you have done that, be on your guard against a second kind of wandering. For those who are sick to death in life, with no mark on which they direct every impulse or in general every imagination, are triflers, not in words only but also in their deeds.
8. Men are not easily seen to be brought into evil case by failure to consider what passes in another's soul; but they who do not read aright the motions of their own soul are bound to be in evil case.
9. Always remember the following: what the nature of the Whole is; what my own nature; the relation of this nature to that; what kind of part it is of what kind of Whole; and that no man can hinder your saying and doing at all times what is in accordance with that Nature whereof you are a part.