I preach the Word of God because it is understandable. God revealed his Word in such a way that it can be comprehended with clarity (cf. Psalm 119:105, 130). If he had not done so, the Bible would no longer serve as an objective standard for life, since it could not be understood in a straightforward sense. Yet, because he has revealed his Word in a way that is universally comprehensible, all men are accountable to it.
If the clarity of Scripture is denied, the certainty of any biblical doctrine must also be rejected, since we can no longer be sure that the Bible actually means what it says. Once doctrinal certainty grounded in biblical authority is dismissed, personal convictions must also be discarded, since they no longer have any firm foundation. And if personal convictions disappear, spiritual community will also vanish, since true fellowship necessarily begins with shared doctrines and convictions.
A healthy church is one that is motivated by a common affection for God and his Word and really knows what it is to love one another. That affection, both for God and for others, arises out of the confidence that the Bible is true, that it is absolute, and that it can be understood.
Scripture is clear. Deny that simple fact and you forfeit all confidence and conviction. No wonder evangelicals who have drifted away from the centrality of Scripture seem to lack certainty and clarity about anything.
- John Macarthur, ‘Why I Still Preach The Bible After Forty Years Of Ministry’, in Preaching the Cross