If you can’t use the Bible, you don’t really understand it.
It may sound backwards to speak of “using” the Bible: we don’t stand over the Bible, twisting it to our ends; the Bible stands over us and is one major means by which God uses us.
That’s all true, but think of it this way: when I’m tempted, or struggling, or arrogant, or lying, or spiritually lethargic, what am I supposed to do as a Christian? I’m supposed to avail myself of the grace of God, and one major means by which God gives me that grace is my Bible. If my mind is blank of Bible in times of trouble, I’m not using God’s word the way I’m supposed to. To apply a text of Scripture well is to use it with love and faith according to its intended purposes.