Being a good person is difficult. It takes a lot of concentration and sacrifice. It requires you to do what is right even when other people are doing what is wrong.
But actually, it’s even harder than that. If you are a sinner (and everyone is) you cannot just automatically become a good person by trying hard. Your sins are still with you in your soul. You are an inherently selfish and greedy person, and you can never defeat your own wicked lusts 100% of the time.
You, yourself, are actually incapable of paying the cost that it takes to make you a good person. Fortunately there is one person who is capable of paying the price for you. That person, of course, is Jesus Christ.
“He himself bore our sins” in his body on the cross, so that we might die to sins and live for righteousness; “by his wounds you have been healed.” (I Peter 2:23)
The cost of making you righteous is very great. Jesus loves you so much that he decided to pay the price for you. Because if Him you can be a good person if you believe and repent. Don’t take his love or gift for granted.