Romans 1:20 gives assurance that every person in the world can know that God exists:
For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse.
Nature Reveals God’s Power
"A small reflection of the power of our Creator is seen in the thousands of stars shining in the night sky. Galaxies are millions of stars packed close together. And billions of galaxies fill the universe. 
Everyone can appreciate sun-power. The sun lights our days so we can see nature all around us.
Due to our Creator’s laws of physics, visible light is the best energy for the chemical reactions of life. Unlike high-energy radiation, such as x-rays and gamma rays (which harm living cells), visible light enables human eyes to see, plus it powers plant growth, the foundation of all food chains on earth."
HenryMorisIII