Reb Efshar:
It could be "efshar", that the Rav, was not talking about people like us.
And, it is also "efshar", that we are not on his madreiga,and so therefore his eitzas do not apply to us. Efshar?
I only no one thing. Simcha is the highest form for one to be matzliach....period.
The shaila is anyway...what IS lev Nishbar, and what is the concept of the 12 steps where one wants to remove all of his ego, and thereby, and only thereby can he connect to Hashem. By emptying himself from all of "himself",only then can he allow Hashem to come in, and it is Hashem that we are in need of. Emptying one's ego is not the same as lev nishbar.
So, taking this into account, I have seen over, and over again that it is simply NOT pashut, to go to "lev nishbar", and then keep oneself from falling into depression. I saw this concept many times by the heileger Ba'al Shomer Emunim. If a person is not sure that he can control this lev nishbar, from leading to atzvus, and then to depression, then he must stay away, and NOT think that he is a tzadik by shovering d'lev.
I also saw in the sefer, that one in our matzav, by thinking all of the trash that we have been thinking about, and by looking at, and being miharher after all of the shmutz in the velt, we have basically corrupted our brains, destroyed our klei moach, and the only thing that can heal it is........ SIMCHA!!!!
And another thing: We all see how hard it is to be b'simcha. It is so difficult, that to do this alone is such a korban to Hashem. Especially in light of our past, to go against our teva (and this what it is all about) to go against our teva, and be b'simcha.......not for us, for Hashem's sake. I believe that most of us who are already on the tight rope swaying to, and fro between, border anxiety, and depression, we must stay away from this derech....at least for now.