"for we walk by faith, not by sight—"
2 Corinthians 5:7
There is no other way to follow Christ, but to walk by faith. We can't see Him, we can't touch Him, but when we have committed our lives to Jesus, His spirit living within us testifies to our spirit that we know Him, and that we are known by Him. And so we walk. Walking implies movement, advancement. "We are always to be making advances. We are to be going from faith in its beginnings to faith in its perfections— from faith to assurance—from assurance to full assurance. And from there we are to go to the full assurance of hope to the full assurance of understanding—always forward, waxing stronger and stronger. There is a progress to be made in every Christian Grace and he who carefully marks the terms used about Christian Graces will discover that there are degrees in all of them, while each of them are degrees one above the other. Walking implies progress and the genuine Christian, when he is in a healthy state, may truthfully say—“We walk.” (Spurgeon)