Isaiah 64:6--But we are all as an unclean thing, and all our righteousnesses are as filthy rags; and we all do fade as a leaf; and our iniquities, like the wind, have taken us away.
Isaiah was a prophet, but his prophesies were usually very poetic. Outside of the actual poetic books of the Bible, Isaiah contains some of the most poetic passages in the entire canon of Scripture. The above verse is nothing but similes, and they all deal with the topic of man's depravity. So, what exactly is the Holy Spirit trying to tell us through these four comparisons?
So what are we to do? In just one verse containing four similes we've heard the worst news possible: Every human being is a sinner doomed to die one day, and there is no way we can save ourselves. But praise God that he has not left us helpless. He loves us and wants no one to perish. That's why Jesus our Lord came to this earth and died for our sins, to become our Atonement, Sacrifice, and Savior. Without Him we are hopeless, but with Him we have eternal life, joy, peace, hope, and happiness.
If you are saved today, rejoice in this fact! Rejoice that you have been rescued from an eternal destination called Hell and that this salvation can never be lost. Rejoice that you have been taken from the clutches of the devil and made a child of the living God. Rejoice that you have been freed from the power of sin and are a conqueror through Jesus Christ. Now go out and tell the world about it.
However, if you are not saved, then you have no reason to rejoice except for the fact that God offers salvation this instant. It's a free pardon of sin, a gift paid in full by Jesus, and you just have to reach out and take it. Simply pray to God, asking for forgiveness of your sin and trusting in Jesus' death, burial, and resurrection. I plead with you--and so does God--to not put this off. Now is the day of salvation, for you know not if you have tomorrow; you don't even know if you have the next second. Accept Him into your heart now. See the Salvation tab above if you need more detailed information.