Do Not Let the Voice of Conscience Drown Out the Voice of God

The sermon opens by challenging the widespread belief that conscience is an absolute moral standard. Pastor Thai Quang Tan uses three concrete historical examples to demonstrate that conscience changes according to the individual, circumstances, and time: the story of Di Tu Ha and the king of Wei shows that conscience can judge the same act in completely opposite ways depending on emotion; the U.S. Supreme Court's 1857 ruling on slavery reveals that millions of people in the same society can hear two entirely opposing voices of conscience; and the redefinition of marriage in the twenty-first century shows that collective conscience can reverse itself completely within a few decades.

The second section explains the critical distinction between conscience and the law of God, drawing on Romans 2:14-16. The pastor explains that God's law is written in the hearts of all people, while conscience serves only as a witness to that law, not the law itself. He uses two vivid illustrations: conscience as a skylight that allows the light of God's law to shine into the human spirit, and conscience as an alarm system that detects sin. If the window is shut or the alarm is turned off, a person will no longer recognize the sin they are committing even though God's law still condemns it.

The third section analyzes the causes of a conscience becoming weak, hardened, or corrupt, drawing from 1 Corinthians 8:7, 1 Timothy 4:2, and Titus 1:15. The first reason is when people continually refuse to listen to the convicting voice of conscience, illustrated by the Avianca airline crew who silenced the warning system before the plane crashed into a mountain. The second reason is when people replace God's law with laws constructed by society, causing the conscience to confuse sin with morality. John Bunyan's allegory of the poisoned gatekeeper in The Holy War vividly portrays this moral confusion.

The concluding section directs the congregation to the only One who can truly cleanse the conscience — Jesus Christ. Drawing from Hebrews 9:13-14, the pastor affirms that the blood of Jesus is infinitely more effective than animal sacrifices in cleansing the conscience from dead works so that people may serve the living God. The silence or approval of conscience is not proof of righteousness, because God alone judges according to His standard. Romans 8:1 is quoted as a precious promise: all who receive Jesus Christ will no longer face condemnation, declared not guilty not only before the court of conscience but also on the final day of judgment.