It's been said, "familiarity breeds contempt." So, how do we keep this from happening in our relationship with God? We have to work to remain Astonished at God's Amazing Grace and love.
You can know something about a person, their biography, greatest achievements, famous sayings...but still be a stranger to them. Real relationships require something more. Presence. Pursuit. A genuine willingness to close the distance.
If you want to pursue a deeper relationship with God, be sure to request the book The Pursuit of God by A. W. Tozer.