Moving beyond the subject of the necessity of special revelation, the Scripture is necessary for our spiritual growth. We need special revelation to know the will of God more certainly and more clearly. Certainly, we know the law of God by virtue of us being made in the Imago Dei, and therefore, we know some things concerning the will of God and right and wrong. But as we noted above, just like general revelation has been corrupted through the Fall, so likewise our perception of the MORAL LAW is corrupted and not clear. Therefore, it pleased God to reveal His perfect law to us in the Bible with words, so that His people would more clearly know what He said and what He meant (see chapter 19). The Scripture is necessary for us as Christians because it is our spiritual food. Our Master, as the God-Man, repeatedly appealed and relied on Scripture, how much more should we? When tempted by Satan, the Lord famously said:
Matt. 4:4 But he answered, “It is written, “‘Man shall not live by bread alone, but by every word that comes from the mouth of God.’”
Notice that even in upholding the necessity and authority of Scripture, the Lord Christ appeals to Scripture (Deut. 8:3). We do not truly live by physical bread and food alone, but we are to live by every word of God. Notice how the Scripture is here described. It is said to be “word[s] that comes from the mouth of God.” It has its origin with the God of the world and it is Him speaking by His mouth to us. We are to feed and live on this Word. The Lord does not say that we should feast on the Word, implying that we read and study it occasionally. But the Word ought to be like bread to us—every day’s food. We are to read and study Scripture daily so as to grow in our faith and in our relationship with God.
In 1 Peter 1:23-2:2, the apostle Peter speaks about the “imperishable…[and]…the living and abiding word of God” (v. 23), which “remains forever” (v. 25; cf. Isa. 40:8) and which is “the good news that was preached to you” (v. 25). He goes on in chapter 2 to speak of us as “newborn infants” who “long for the pure spiritual milk” (2:2), which is the word of the Lord about which he is writing. Just like newborns cannot survive without the milk of their mothers, in the same way, Christians are dependent upon the Word of God.
The subject of mediation and delight of the Psalmist is “the law of the LORD” (Ps. 1:2). He does not occasionally think about the Word of God, rather, “he meditates day and night” on the Word of God. It is an essential part of his life. It is the light in which he walks (Ps. 119:105). He stores up God’s Word in his heart and has the desire to learn more from God (Ps. 119:11-12, 18, 20). His delight is in God’s Word (Ps. 119:16) and on it he meditates (Ps. 119:15, 23, 27, 48, 78, 148). And so goes the 119th Psalm praising God for giving us His Law and His Word as a guide and self-revelation. A Christian cannot be spiritually healthy without the Word of God.
Although general revelation reveals that there is a God, yet it is not enough to save us. General revelation condemns. That’s why special revelation is necessary for salvation and special revelation inscripturated in Holy Writ is necessary for Christian discipleship and spiritual growth.