Declare is to announce, assert (emphasize, insist on), proclaim, affirm, uphold…and in this case: establish.

The heavens declare.

The synonyms of declare deepen the meaning.

The heavens assert.

The heavens proclaim.

The heavens affirm.

The heavens uphold.

They establish…

What?

The Glory of God.

(Photos taken Wednesday, 7-8-20 a few brief minutes before sunset.)