Faith is the opposite of sight

The Christian life is one of faith, which by definition is believing in what you cannot yet see. 2 Corinthians 5:7 says "For we live by faith, not by sight." This shouldn't be shocking however, as we can't "see" gravity but we can "feel" its effects. The same is true with God. While we can't "see" God directly, we can see Him all around us in Creation, hear Him and feel Him  in His word the Bible as He teaches us, and commune with Him through prayer. He is all around us, we just need to look, listen and seek Him.