Hearing and reading provide a telescopic view of the scripture while study and memorization provide a microscopic view of scripture. Meditating on the scriptures brings hearing, reading, studying and memorization together and cements the word in our minds.
Rev.1:3 Blessed is he who reads and those who hear the words of this prophecy [...]
1 Tim.4:13 give attention to the public reading of Scripture [...]
Acts 17:11 Now these were more noble-minded than those in Thessalonica, for they received the word with great eagerness, examining the Scriptures daily, to see whether these things were so.
2 Tim.2:15 Be diligent [KJV `Study'] to present yourself approved to God as a workman who does not need to be ashamed, handling accurately the word of truth.
Ps.1:2-3 But his delight is in the law of the Lord, And in His law he meditates day and night. And he will be like a tree firmly planted by streams of water, Which yields its fruit in its season, And its leaf does not wither; And in whatever he does, he prospers.
The Navigators illustrate this by saying that as the thumb can touch all the fingers, we can meditate on the Word as we do any of the first four. Meditation is a key to revelation. A new Christian needs to hear and read the Bible more than they need to study and memorize it. This is so that they become familiar with the overall message of the Bible.