Messages that can only be understood under the influence of psychedelics

Shift your perspective, instead of imagining that the lines are flowing over the black (along the paths with coloured borders), imagine that black stripes are flowing and covering the surface which has something inscribed on it.

So before you can actually start reading the text, you have to actually see the surface, which will in some sense appear as the widening of the lines across the curved flow axis. So the lines start turning into flowing stripes which reveal the surface beneath (full of text and aliens), you then have to try and hold that state.

It is like that spinning balerina.

EDIT: One more thing. The lines flicker, right? Since the "surface" underneath is interchangeably black & white, you must notice that the black stripes have straight borders. This will also make it easier.

...

The white lines turn into "stripes revealing the surface underneath" even though when ignoring this, you only observe a white line. For me, if that shift of perspective is possible, then as an observer I can't vouch on the true width of the white lines, because if I switch my perspective, even as slightly as the lines widen, I cannot as a single observer give a definite statement on their width. Video analysis would only empirically confirm it if I stay correct.