God makes Himself known through His creation – the things that He made. He said through the Psalmist,
“The heavens declare the glory of God; the skies proclaim the work of His hands. Day after day they pour forth speech, night after night they reveal knowledge… their voice goes out into all the earth, their words to the ends of the world.” (Psalm 19:1-2, 4a)
Creation is constantly, 24/7, proclaiming the goodness of God – His power, His constancy, His divineness, His love for humanity. All we have to do is look to see it; it’s there for us to discover.
People sometimes ask for a “sign from heaven” or something akin to it – to prove that God is real. But all they have to do is look at the things God made to “prove it”: The way the trees and flowers grow, the splendor of the mountains, the raging seas that (usually) stay in their place, the changing of the seasons. It all declares God’s majesty to anyone who will listen.
Paul summit up in his letter to the Romans,
“Since what may be known about God is plain to [everyone]… For since the creation of the world God’s invisible qualities – his eternal power and divine nature – have been clearly seen, being understood from what has been made.” (1:19-20)
It doesn’t take a brilliant professor of theology to understand God’s goodness. Anyone who can see or feel the things God has made can come as close as possible to understanding God revealed through His creation.