Comment by Elli:
"Δύναμη" [dyname] is the Greek word for the english words as force, vigor, power, and strength. Νature is dynamic and not static.
And as the ES 37 says : Nature is weak toward evil, not toward good: because it is saved by pleasures, but destroyed by pains.
Our natural condition is strengthened and enhanced by the enjoyment of pleasures past, present and expectation of the future ones.