The existence of God on earth is not something we should be looking for prove, because when we watch around we will see a reason to know that God truly existed. From the beginning the bible told us that God created heaven and earth. The gift of life we get everyday and how beautiful the nature looks is another reason to prove that God truly existed.
The conscience of human being is a very big evidence to show that God exist. When we do what is wrong, we easily identify that this thing we did is wrong and when we do the right thing, we also know that this thing is right. The ability for human to know the difference between good and bad is an enough evidence to believe that he really exist.
The resurrection of our lord Jesus Christ is a good evidence to know that they is higher power above and it existed. Jesus came to this world to die for our sins. We should know that only a true God that will go and die for his people for them to be save.