And as Jesus passed on from there, two blind men followed him, crying aloud, “Have mercy on us, Son of David.” When he entered the house, the blind men came to him, and Jesus said to them, “Do you believe that I am able to do this?” They said to him, “Yes, Lord.” Then he touched their eyes, saying, “According to your faith be it done to you.” And their eyes were opened. And Jesus sternly warned them,“See that no one knows about it.” But they went away and spread his fame through all that district. (Matthew 9:27-31, ESV)
Seeing is believing refers to the undeniability of events witnessed first hand. In other words, we believe because we see. The two blind men professed their belief that Jesus could heal them, and his response was “According to your faith be it done to you.” Their healing was based on their faith. Thus these men could see because they believed.
Today we walk by faith not by sight (2 Cor. 5:7). Someday our faith will be our sight. Oft quoted Hebrews 11:1 describes faith as “the evidence of things not yet seen.” Without faith those things will never be seen. So for us, like the two blind men, believing will be seeing.