Self mortification, like what Bankei went through is, is definitely not necessary. And it's the teaching of what is um, has always been to avoid the extremes of, of self mortification and self indulgent, indulgent, right, because they both tend to emphasize the self. So, there is there is the side of it, but he also elsewhere points out that it's necessary for people to know this unborn wouldn't mind for themselves. And that can involve difficulty at times, and having to persist through difficulty. So the bodhisattva, Buddhas and bodhisattvas can point the way and that is of huge value. This pointing of the way that's comes out of personal experience. But still, there's work that we have to do ourselves according to our individual karma.