The second, to divide each of the difficulties under examination into as many parts as possible, and as might be necessary for its adequate solution. - René Descartes

Divide each difficulty into as many parts as is feasible and necessary to resolve it.

And thus, the actions of life often not allowing any delay, it is a truth very certain that, when it is not in our power to determine the most true opinions we ought to follow the most probable.

Remembering, however, as I have already said, that the natural light is to be
trusted only in so far as nothing to the contrary is revealed by God Himself. …
Moreover, it must be fixed in one's memory as the highest rule, that what has
been revealed to us by God is to be believed as the most certain of all things;
and even though the light of reason should seem most clearly to suggest
something else, we must nevertheless give creedence to the divine authority
only, rather than our own judgment. (Principia philosophiae, pars prima 28 and
76.)

those people who formerly had been half wilde, and civiliz’d but by degrees, made their laws but according to the incommodities which their crimes and their quarrels constrain’d them to, could not be so wel pollic’d, as those who from the beginning of their association, observ’d the constitutions of some prudent Legislator.