Find a clear way to think about how all things change into one another. Keep this always in mind. Practice this way of thinking until it becomes natural. Nothing else will better help you develop true greatness of spirit.
To find out, and set to thyself some certain way and method of contemplation, whereby thou mayest clearly discern and represent unto thyself, the mutual change of all things, the one into the other. Bear it in thy mind evermore, and see that thou be throughly well exercised in this particular. For there is not anything more effectual to beget true magnanimity.