The Fourth Way:
I WISH TO REMIND YOU that this system is based on understanding. Understanding must occupy the first place in this system. The more you understand, the better the result of your work will be.
Q. Why cannot I understand the least thing when I think about it, but sometimes understanding suddenly comes?
A. Understanding always comes that way—you understand, and then you cease to understand. But if all attempts to understand something go wrong, try not to think about it but try to remember yourself, that is, to be emotional, and in time you will understand. Understanding does not become permanent at once; as in everything else there are many steps and you can understand something one day and not understand it the next day, for you may be more conscious in the same circumstances one day and more asleep the next. So many days may pass before it becomes your own.
~P.D. Ouspensky