How can I believe in a God I don't see?
Some people base their disbelief on the fact that they cannot see God. The Bible testifies that God is invisible and has no physical form. He, the Creator of all things, is greater than the universe and everything that exists. From the Bible, we learn how God appeared to people as light or in the form of a cloud. In other places, God temporarily took on the appearance of a human or an angel. In some prophetic writings, God is described as a person with white hair sitting on a throne. In these examples, God appears in visible form to interact with his creatures.
In the Old Testament, God spoke to prophets through dreams and visions. Occasionally, God performed miracles to confirm the messages of His messengers. Yet despite these visible signs, many people were unwilling to listen to God and follow His instructions. It was similar with Jesus, the Son of God. When Jesus was on earth, people saw and heard him. They ate and drank with him; they spoke with him, and they could touch him. They witnessed the unique miracles that Jesus performed among them in the power of God. The leaders of his people knew that Jesus had fulfilled all the prophecies of Holy Scripture, which were meant to prove that he was the Savior promised by God. Yet many did not believe his message or turned away from him.
The real reason people don't believe in God is that they are unwilling to submit to God's rule. Whether or not they can see God usually has nothing to do with it. It is primarily human pride that prevents them from coming to God. Faith requires a humble heart and the understanding that God's will, not ours, should determine our lives. Those who don't want to believe in God will never allow anything to convince them of God. Instead, they will always find reasons and excuses for their unbelief. When they stand before God's throne on the Day of Judgment, they will no longer be able to deny Him, even if it will then be too late for repentance....
The Bible says that God's existence is evident in His works; that is, in everything He has created. This includes nature, the universe, and us humans. The perfect order and stunning beauty of God's creation make it easy to see that only a benevolent and almighty Creator can be considered its cause. Therefore, there is no excuse for us humans not to believe in God. Even though God is invisible, everyone has the opportunity to become convinced of God's existence. If we seek God with our whole heart—for example, by reading His Word and asking about Him—we can get to know Him personally and experience His love and faithfulness. Those who understand how great and glorious the Creator of all things is and how much He loves us humans cannot help but love and worship God. Those who open their hearts to God and live according to His Word will recognize God's presence in all areas of their lives. In this way, we can be as close to God as if we could see Him. In this way, faith becomes alive and the existence of God becomes a firm and indisputable certainty.
The wrath of God is being revealed from heaven against all the godlessness and wickedness of people, who suppress the truth by their wickedness, since what may be known about God is plain to them, because God has made it plain to them. 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, so that people are without excuse. For although they knew God, they neither glorified Him as God nor gave thanks to Him, but their thinking became futile and their foolish hearts were darkened.
Consequently, faith comes from hearing the message, and the message is heard through the word of God.
For we live by faith, not by sight.
Now faith is confidence in what we hope for and assurance about what we do not see.