difficult sentence

[adel87]

dear
in these sentences
1)And then I saw the fields
with my own eyes... watched them liquefy the dead... so they could be fed intravenously to the living.
And standing there,
facing the pure, horrifying precision...
please what they use ing in face and horrify
please what is the difference between could be fed and can be fed

2)...the machines had found all the energy
they would ever need.
please what is the meaning of ever i've found a lot of meaning of dictionary
thank you

 

[Tdol]

Facing- looking at horrifying- shocking, disgusting, terrifying
It's the past tense- the sentence is about the past.

2 = they would need at any time in the future