One day after another day causes speech to bubble forth, and one night after another night shows forth knowledge.

Ps. 19:1-6.

The testimony concerning God’s glory and Creatorship is not limited to what can be seen in the heavens during the course of one day or one night. One day after another day and one night after another night present the same testimony. Just one 24-hour display of the sun, moon and stars would provide a marvelous witness concerning the Creator. But each day this testimony can be read in the skies above. So it is as if this witness is continually bubbling forth or effervescing by day and, during the night, the visible heavenly bodies are likewise providing knowledge concerning Jehovah’s glory and Creatorship.