short Dzogchen text "Cuckoo of Awareness": I believe one could attain instant enlightenment possibly just contemplating this one text

 In variety, there is no difference.

And in parts, a freedom from elaborations.

Things as things are, are not conceptual, but

The shining forth of appearances is All Good.

Since you are finished, cast off the sickness of effort!

Resting naturally, leave things [as they are]."^[27]