The Bible tells us that faith means being confident in the things that we hope for. It means living with an assurance about the things that we are not able to see (Hebrews 11:1). John 3:16 tells us that God loves us so much that He gave His only Son in order to secure eternal life for us. Although we can't see God, if we have faith, we can be confident in that promise. When we believe in that promise of salvation that God provides for all who believe in and follow Christ, we can persevere through any trials we face in life.
None of us has seen God, but through faith we can be sure that He exists. None of us has seen Jesus, but through faith we can be sure that He was sent by God to atone for our sins. When we believe that Jesus is the Son of God, when we give our hearts and our lives to Him and believe that He gave His life for us, we are freed from the chains of sin with which we were bound. This faith in what we cannot see is possible because of the power of the Holy Spirit, who dwells in us when we accept Christ as Savior.
Belief in what we have not seen comes with a blessing. Jesus tells us that when we put our trust in that which we can't see and yet still believe, we are blessed (John 20:29). When we have faith in Jesus, despite the fact that we can't physically see Him, that is precious to God. God rewards this kind of faith. His gift to those who have faith without seeing is a joy that is both glorious and inexpressible. That incredible joy comes from knowing that, in Christ, we receive the salvation of our souls (1 Peter 1:8-9).