The Word of God is living and powerful, and we can experience this power throughout the pages of Scripture. One section that has been sticking with me lately is Ezekiel chapter 3, specifically verse 18 which reads:
When I say unto the wicked, Thou shalt surely die; and thou givest him not warning, nor speakest to warn the wicked from his wicked way, to save his life; the same wicked man shall die in his iniquity; but his blood will I require at thine hand.
Read it a couple more times. In context, God is speaking to Ezekiel to have him warm his people about judgment and sin. Ezekiel is God's watchman. While this has it's historical significance, I do believe it applies today, and it's something believers should take to heart.
The sinner will stand before God for their own actions, but God will not hold us blameless if we fail to warm them of His judgment. I think it's interesting that the gospel is given as a warning, when the church today is made so weak by caving to the world and is fearful of "warning" others because that would be "judging" according to the world.
Whom we preach, warning every man, and teaching every man in all wisdom; that we may present every man perfect in Christ Jesus. - Colossians 1:28
Yes, we need to warn people of where their actions will lead them if they do not turn to Jesus Christ. Let no one go unwarned or unprayed for.
Please check out the podcast I did on this subject here: Ezekiel 3