What does Psalm 19:6 mean?

In this verse David writes that the sun rises from the end of the heavens, and its circuit takes it to the end of the heavens. Like everyone else, David observed the daily rising of the sun in the east and its setting in the west after making its way through the sky. It completes its journey by returning to its rising place each morning. The observation is strictly from a human perspective, just as modern weathermen still use terms like "sunrise" and "sunset."

The sun's presence is felt as well as seen. Nothing escapes the light and heat of the sun. Although some places on earth are colder than others, even the coldest places feel its heat. In God's wisdom, He placed the sun at precisely the right distance from the earth, on average about 93 million miles, or 150 million km, away. Wherever the sun is visible it offers a testimonial to God's creative wisdom and power. No one can say he or she has received no evidence of God's existence (Psalm 19:1; Romans 1:18–20).