For while we were still helpless, at the right time Christ died for the ungodly. For one will hardly die for a righteous man; though perhaps for the good man someone would dare even to die. But God demonstrates His own love toward us, in that while we were yet sinners, Christ died for us. Much more then, having now been justified by His blood, we shall be saved from the wrath of God through Him. For if while we were enemies we were reconciled to God through the death of His Son, much more, having been reconciled, we shall be saved by His life.
God made you His friend when you didn't deserve it; and now He's living in you to transform your life!
Did your sinfulness keep God from reaching out to you in love and offering you His grace and forgiveness? No. Now consider this — if God loved you enough to show you grace when you were His "enemy", why wouldn't He hold you in His grace when you sin now that you are His child? If you've sinned, rest assured that God knew that sin was in your future when He first chose to offer you salvation.
And God has not only forgiven you, He's given you Himself. He wants to live through you the kind of life you're unable to live on your own. Will you allow God to live through you today?