The Bible says: "For all have sinned, and come short of the glory of God;" - Romans 3:23
Sin is anything that I think, do, or say that breaks God’s law. All of us are guilty of choosing occasionally to disobey God in action, attitude or thought.
The Bible says: "But your iniquities have separated between you and your God, and your sins have hid his face from you…" - Isaiah 59:2
"For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord." - Romans 6:23
Our sins separate us from a holy God. They separate us from Him in life and in death. Those that do not receive Christ will spend eternity separated from God in a real place called hell.
The Bible says: "But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death." - Revelation 21:8
Do you believe that you are a sinner?