- 乾以易知，坤以簡能；易則易知，簡則易従；易知則有親，易従則有功；有親則可久，有功則可大；可久則賢人之徳，可大則賢人之業。易簡，而天下之理得矣；天下之理得，而成位乎其中矣。≪繫辭傳上・周易≫

- 恐内生、不易解。驚外来、易解。

"Since we cannot achieve universality by knowing everything that there is to know about everything, we must know a little about everything. For it is much better to know something about everything, than everything about something. That universality is the finer. If we could have both it would be even better. But if we have to choose, we must choose that one." 228 Pensees