Where can we find the New Covenant?

I believe Joseph Smith, and perhaps his associates, accessed the higher Christian "new covenant" long before the temple ordinances were ever introduced, even as early as the First Vision. The confusion, as I understand it, is that access to that higher covenant is not through carnal commandments and ordinances, not even those within the temple on Earth.

Non-Self Reveals the True Self

When the false self dies—the ego, the old creature, the constructed personality, the illusory self, the separate independent idea of one's self, the man of sin, the son of perdition, the natural man, the carnal mind—when this is seen for what it really is, when it is revealed in truth, when it is put off, taken out of the way, when it is crucified and passes away, then the true Self is revealed in glory.