Using "can", "should" and "never"

Honestly speaking, everything is possible... and everything happens. There are tons, megatons of things I am ashamed to remember about.
But this is natural. And we should never be unhappy with this. But... this is not our purpose. And we should never be happy with this.

One can never combine these "shoulds" logically. But it comes out easily when having a long daily conversation with our Beloved.