Speaking of the Paramita of Effort, whatever our faults may be, we did not acquire those faults overnight. We must expect to need to exert as much effort to change as we actually exerted to create those faults. In my case it has taken over 60 years to create the kind of person I am, good points and bad points. If I want to change something bad about myself, then I will need to strive equally as hard to create new good to replace it. Perhaps it will take less time, but only if I exert concentrated effort. An overgrown garden where weeds have taken over didn’t become that way overnight, and will not suddenly and magically revert back to a weed free and orderly state merely because we wish it to be so, but only by continued attention to its defects and nurturing of its perfections.
Lecture on the Lotus Sutra