What happens when you use a knife repetitively? Over time, the blade starts squishing tomatoes instead of slicing them. Pencils need sharpening. Pens need refills, drills need charging. Tools have to be maintained in order to be effective. In a similar way, we are instruments of God. Are we sharpened, filled, and charged for action? Or, are we gunked up, run down and dull?
Tools are important for good Bible study.