If you want to grow spiritually, you need a consistent diet of Scripture. In fact, you will never outgrow your consumption of Scripture. There is no substitute. There is no supplement. The poet, T.S. Eliot, once observed: “Everything we eat has some effect upon us. It affects us during the process of assimilation and digestion; and I believe exactly the same is true of anything we read.” In other words, you are what you read.
I have a saying that I repeat to our congregation frequently: reading without meditating is like eating without digesting. If you want to absorb the nutrients, you can’t just read it. You’ve got to chew on it. You’ve got to digest it. Meditation is the way we metabolize Scripture.
I find this very encouraging and challenging, and I would encourage you to go read his article here.