Sin is justified by the excuse that we cannot understand the difference between right from wrong, truth from error. God gave us the capacity to know the truth and designed his Word to match our capacity to understand. The truth is not subjective (Personal feelings). The truth is objective (Impartial, Neutral). The truth is fact, not fiction. If you want to make up your own set of facts, leave the God’s truth alone. There is a truth and the truth is in Jesus (Eph 4:21). If we seek to find truth, we must allow God to be true and every man a liar (Rom 3:4). We must cast off the doctrines and commandments of men in order to find the truth of God (Matt 15:7-9 f; Tit 1:14).
Satan replaces God’s exclamation points with question marks. God warned Adam and Eve not to eat of a certain tree, with this emphatic penalty: “For in the day that you eat thereof you shall surely die” (Gen. 2:17). When Satan seduced Eve to eat, he started by planting a subtle doubt with the question, “Yes, has God said, You shall not eat of every tree of the garden?” Then, he denied the certainty of the penalty and presented sin as a great advantage withheld by God’s Word (3:4-5).
1. We can know about God. God filled the universe with the evidence of his reality. “For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse” (Rom. 1:20). Though God is invisible, his existence can be “clearly seen” and “understood” by reflecting on the creation. All life’s blessings bear clear testimony to God’s love and care for us (Acts 14:17). Such evidence makes the doubt and denial of atheists and agnostics utterly “without excuse.”
2. We can understand God’s offer of salvation in Christ. “For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord” (Rom. 6:23). Jesus made the truth accessible by both his teaching and example. He is so much the perfect embodiment and revelation of all truth that he is called “the Word” (John 1:1, 18). His miracles confirmed his claim to be God’s Son, but some men hardened their hearts, closed their eyes, and doubted (John 3:2, 16 cf; 10:24-25). As Jesus taught men about salvation from sin, he said, “If you continue in my word, then are you my disciples indeed; and you shall know the truth, and the truth shall make you free” (John 8:31-32). Yes, we can “know the truth”!
3. We can know about baptism. We are saved from our sins when we believe and confess in Christ, repent of sin, and are immersed in water by His authority. Jesus said that “all the world,” “every creature,” and “all nations” can understand the necessity of faith, repentance, and baptism as conditions of pardon (Mark 16:16 f; Luke 24:47). We can understand that immersion involves a burial in water, not mere sprinkling or pouring of water (Rom 6:3,4 f; Col. 2:12). The sinner comes to Christ in order to be “baptized into one body,” the body or church of Christ (1 Cor. 12:13). The “one baptism” puts us into the “one body” — not some human denomination, but the church whose name, doctrine, and practice are found in the New Testament (Eph. 4:4-6).
4. We can know about singing vs. instrumental music. God has always given his people a pattern for acceptable worship which is clear and understandable. His Word is an unalterable pattern of truth (Ex. 25:9 f; 2 Tim. 1:13). Singing is clearly authorized in New Testament worship (Eph. 5:19 f; Col. 3:16). Instrumental music is added by human doctrine, will worship, and departure from the faith (Matt. 15:8-9 ff; Col. 2:23; 1 Tim. 4:1).
Conclusion: Sin and error thrive on doubting God’s revealed truth. Some men are “ever learning, and never able to come to the knowledge of the truth” because they look for ways around the truth rather than looking for the truth (2 Tim. 3:7). Doubt and denial are spread by smug questions like, “Do you claim to know all there is to know?” or, “Do you think you can never make a mistake?” We do not have to know everything or be above mistake to know God exists, salvation is only in Christ, baptism is a condition of pardon, and the New Testament church sang but used no instrumental music. We know these things by reading God’s Word and refusing to replace his exclamation points with Satan’s question marks. We know the truth because it derived from God’s perfect holy Word, unaltered, and God cannot lie (1 Cor 4:6 ff; 2 Tim 3:16,17; Ps 18:3o; Heb 6:18).