This answer requires us to define two words, SIN and GOOD.
The Bible defines sin not as a bad deed, but rather anything that we do that separates us from an intimate relationship with God. We can recognize how adultery destroys the trust between a husband and wife often leads to separation. That’s what sin is like, an action that seems to be good, or one that we rationalize as good can cause a break in a relationship. Stealing items of value, or lying, or saying something that damages the reputation of another person are all acts that destroy trust and break relationships. We may not feel it at the time, but sinful acts often create feelings of guilt and shame and can lead to depression or worse.
The second definition we have to consider is “good”. What do you mean when you say that you are “basically good”? What is your objective standard for measuring goodness? In the Bible we are reminded that no matter how good or righteous we think we are, by God’s standard of holiness and perfection our righteousness is like filthy rags. (Isaiah 64:6) So, it is clear by God’s standard that you are a sinner even when you believe you are a “good” person. You don’t get to place all of your goodness on one side of a scale and expect it to outweigh your sin on the other side of the scale. No matter how much good is attributed to you, if you do not believe in Jesus Christ as your Lord and Savior you will not be able to experience God’s love and forgiveness.
The good news is that while we were yet sinners Christ died for us. (Romans 5:8) Jesus paid the penalty for our sins at the cross. So now we can experience forgiveness and relief from sin that God offers when we put our trust and faith in Him. That also means that when we stumble into sin again we can seek God’s forgiveness and restore our relationship with Him. When we abide in Christ and walk in the light of God’s Inspired Word we are able to overcome sin and its power in our lives. Are you a follower of Jesus so you can enjoy God’s forgiveness and the abundant and eternal life that is available only in Him? If not, why not do it today.