@Leo Fultz,
For "All is One", I would follow the example of St. Anselm of Canterbury
(
De processione Spiritus) and say
Omnia sunt Unum.
For "All is All", I would say "
Omnia sunt Omnia".
However, on re-reading your request, I see that you are personifying
"one" and "all" (the predicate nominatives). In this case I would still
use
Unum in the first sentence, but
Totum in the second as that
suggests all things considered as a whole.
so:
Omnia est Unum
Omnia est Totum
Please read this.