The eye sees the visible while the mind comprehends the invisible. A God-loving mind is the light of the soul. A person who has a God-loving mind has an enlightened heart and can perceive God with the mind.
St. Anthony the Great
"Live simply and without thinking too much, like a child with his father. Faith without too much thinking works wonders. The logical mind hinders the Grace of God and miracles. Practice patience without judging with the logical mind."
St. Paisios