We believe in God because He is the God who created the entire universe. He created the heavens and the earth. He created plants and animals. He created the stars and the planetary bodies. He created the living things and the nonliving things. He created the spirits and all flesh. He created the wild animals and the domestic animals. God is the Creator of the whole creation. God is the Father of all creation. He is the God of all gods.
We should believe in God for the manifestation of His power. The power of God cannot be measured with any other. His power surpasses that of all other gods and spirits. The powers that be were created by God. He is the original owner of all powers. We should believe in Him for the things that he can do. There is absolutely nothing that God cannot do. There is no situation which God cannot turn around. There is no other power in heaven and earth besides the power of God the Almighty. By His power, he raises the dead. By His power, he heals the sick. The gospel is preached through the manifestation of His power. If anyone doubts God as God, let that person reconsider the things which God has done.
The Bible has revealed God to us in His full majesty and glory. We should believe in Him. Those who do not believe in the existence of God are fools. The Bible calls them fools because any one who thinks in his right mind should understand that it is God who created all these beautiful and massive universe.