One of the more common sins that is going to cause many people to be lost is the sin of lying. Because of this Ephesians 4:25 says, "Therefore, put away lying, let each one speak truth with his neighbor." If we tell a lie it is a little lie, but if someone else tells a lie it is a big lie. There are no little lies or big lies, but as far as God is concerned, a lie is a lie. Proverbs 6:16-19 says, "These six things the Lord hates, yes seven are an abomination to Him: a proud look, a lying tongue, a false witness who speaks lies."
The Bible tells us that "God who cannot lie" (Titus 1:2). God despises a lie. In John 8:44 Jesus says, "You are of your father the Devil there is no truth in him. When he speaks a lie, he speaks from his own resources, for he is a liar and the father of it." When we tell a lie we are like the Devil, but if we always tell the truth we are more like God.
In Acts chapter 5, Ananias and his wife Sapphira had conspired to lie. In Acts 5:3-5 we read, "But Peter said, Ananias why has Satan filled your heart to lie to the Holy Spirit? Why have you conceived this thing in your heart? Then Aninias hearing these words fell down and breathed his last." Three hours later his wife Sapphira came in and also told the same lie. Then we read in verse 10, "Then immediately she fell down at his feet and breathed her last." God struck them dead because they each told a lie. This shows us how God feels about lying.
Revelation 21:8 says along with murderers, the sexually immoral, and the abominable, that "All liars shall have their part in the lake which burns with fire and brimstone, which is the second death." This says that all liars, not some but all liars are going to be lost. So we must put away all lying.