"Therefore, as through one man sin entered into the world, and death through sin; and so death passed unto all men, for that all sinned:-for until the law sin was in the world; but sin is not imputed when there is no law." Romans 5:12-13
There are many people who pretend to be flawless and pure, but God knows all our hearts. God knows when we sin, we cannot hide from him, so why do people still pretend to be without sin?
Sin entered the world by one man, and by one man (Jesus Christ) came the resureection. This is clearly illustrated in 1 Cor.15:21"For since by a man came death, by a man also came the resurrection of the dead.". Adam and Eve were the first persons to try and hide from their sins, but there was no where that they could hide in the universe so that God could not find them. It is no different today for us.
However, one must not be fooled in thinking that we must just continue sinning in God's eyes. If we are born of God, how can be continue transgressing against him. 1 John 3:9-10 let's us know this important point, "whosoever is begotten of God doeth no sin, because his seed abideth in him: and he cannot sin, because he is begotten of God.In this the children of God are manifest, and the children of the devil: whosoever doeth not righteousness is not of God, neither he that loveth not his brother." This teaches us that God never intends for us to continue sinning, in fact, he does not want us to sin at all.
When I was growing up, people would also tell me that, "oh lying is just a little sin man, it's no big thing".  After I understood what the bible teaches, I realized that there are no little or big sins, sin is just sin. What we have is degrees of sin, and the unforgivable sin [Matthew 12:31 "Therefore I say unto you, Every sin and blasphemy shall be forgiven unto men; but the blasphemy against the Spirit shall not be forgiven."].
Sin is all around us, in everything and everyone we meet. We cannot be naive and bury our heads in the kitchen pot. When we face the reality of who we are, and examine all aspects of our life's we will be slow to judge, and quick to point the finger at ourselves each time. Everyone should walk with a mirror in their hands, and hold it up when we decide to rebuke each other. This does not mean that we must not rebuke, because the bible teaches us in 2 Tim 4;2, " preach the word; be urgent in season, out of season; reprove, rebuke, exhort, with all longsuffering and teaching."
When we go out tomorrow, let's take time to reflect of ourselves and the things at circulate in our minds. We may be shocked when we contemplate the things that we often do, and how oftentimes they are sins. Write them down and grab your bible..
"I acknowledged my sin unto thee, And mine iniquity did I not hide: I said, I will confess my transgressions unto Jehovah; And thou forgavest the iniquity of my sin. Selah" Psalm 32:5