questions
Heidegger once again quotes the poet Friedrich Hölderlin , finding in these lines from the poem
"Patmos" a formulation of the paradox he wants to describe: within the "supreme danger" of humanity's enframing orientation to the world lies the potential of a rescue from that very danger.

1. What does "finding in" mean?
2.
finding + a formulation of the paradox he wants to describe + in +these lines from the poem "Patmos"
Is this right?
3. enframing orientation means what?

Question

questions
Heidegger once again quotes the poet Friedrich Hölderlin , finding in these lines from the poem
"Patmos" a formulation of the paradox he wants to describe: within the "supreme danger" of humanity's enframing orientation to the world lies the potential of a rescue from that very danger.

1. What does "finding in" mean?
2. 
finding +  a formulation of the paradox he wants to describe + in +these lines from the poem "Patmos" 
Is this right?
3.  enframing orientation means what?

Answer

1. "Finding in these lines" means "Within the lines quoted, something is learnt" (I assume there was a quote from the poem previously)
2. Not sure what you're asking, but I'd say a simplification would be "Heidegger wants to describe a paradox, and he finds a good way to describe it within the lines of Hölderlin's poem."
3. This is a really verbose, overly-florid use of language, but I think what he means is 'humanity's restricted point of view of the world'.