Double Immutability

The Voice that calls light out of darkness,
Who is yesterday and for always the same,
Cannot speak and it be a lie.

Double immutability:
An unchangeable purpose,
Confirmed by an oath.

"I will never again curse the ground,
I will never again destroy all living things,
And I will never leave you, nor forsake you."

His uttered word:
A steadfast anchor,
Hope for my soul.

"While the earth remains,
There will be seedtime and harvest,
Cold and heat.

"These will not cease:
Winter and summer,
Day and night.

"And I will never leave you."