"A true Christian living in the world is like a ship sailing on the ocean. It is not the ship being in the water which will sink it, but the water getting into the ship. So, in like manner, the Christian is not ruined by living in the world...but by the world living in him. Our daily avocations, yea, our most lawful employments, have need to be narrowly watched, lest they insensibly steal upon our affections, and draw away our hearts from God." (The Biblical Illustrator)