We have to know what is Buddhadharma and what is not Buddhadharma. It needn't go on forever. You don't have to spend 18 years at it. But still, a basic and uncompromised understanding of Buddhist principles is important. Very basic: the three signs of being, the four noble rruths, karma, and so on.
Tenzin PalmoIf you want to be a doctor, you may say, There are all these beings, they're sick, they're dying, I've got to go out and help them. And so you grab a bag full of scalpels and medicine and rush off. Even though your motivation is very pure, you end up harming beings because you don't know what you're doing.
Tenzin PalmoWhen you learn an instrument, it takes an awful lot of time to just learn the scales, and then eventually when you have completely mastered the instrument, the music plays for you. But you still have to keep practicing. And it takes an awful lot of practice. Nonetheless, if you diligently practice, hours and hours and hours and hours, you probably won't get it. You'll probably just end up hurting your fingers.
Tenzin Palmo