John 21:29 Then Jesus told him, "Because you have seen me, you have believed; blessed are those who have not seen and yet believe.
We cannot see the oxygen that keeps us alive. We can't see the dresser in the dark and yet our toes inevitably find it. We can't see the spiritual battles that are ongoing as the forces of evil and the armies of the Living God battle over our souls. Without a microscope, we can't see the cancer cells or the viruses that can devastate our bodies.
Jesus's disciples asked if they could see God. Jesus told them if they saw Him, they have seen the Father. Jesus became frustrated because they were so slow to believe in what they could not see. He spent three years trying to help them understand that the kingdom that He was preaching was a spiritual kingdom, not an earthly one. His kingdom is eternal. The one they were looking for was temporal.
John 20:30 tells us that many miracles were done that were not recorded. We can choose to believe in things we are told but don't see. We can believe the Word of God. We can choose to believe that the Creator cannot lie or we can pick and choose what we want to believe.
Our salvation is by faith alone. We were not there when Jesus chose to endure the cross but we, as Christians choose to believe it. We didn't see Him risen, nor did we see Him ascend into Heaven but the very foundation of our faith stands on those beliefs.
Psalms 3:5 tells us to "Trust in the Lord with all your heart and lean not on your own understanding." We are also told that His ways are far above our ways. We may not understand His ways, but we can put our faith in what we can't see or feel. We can trust in God's love.