Biblical Answer

The difference between a good Christian and someone who's given up is not necessarily about being perfect, but rather about having a personal relationship with Jesus Christ and living a life that reflects that relationship. A good Christian prioritizes Christ over everything, putting the Lord Jesus above their passions, possessions, and the other things that bring them joy. They understand that their good works are a result of Christ living in them, and they give credit to Him for their actions.

On the other hand, someone who's given up may still be trying to be good, but their goodness is not rooted in a relationship with Christ. They may be motivated by a desire to please God or earn approval from others, rather than a genuine love for Jesus. They may also be focused on their own good works, rather than recognizing that their good works come from Christ. This can lead to a loveless goodness, an orthodoxy without charity, and a legalism that is not based on a personal relationship with Christ.

Ultimately, the difference between a good Christian and someone who's given up is not about external actions, but about the heart. A good Christian has a heart that is surrendered to Christ, and their actions are a result of that surrender. They are motivated by love for Jesus, rather than a desire to earn approval or achieve perfection. In contrast, someone who's given up may still be trying to earn approval or achieve perfection, rather than living a life that is surrendered to Christ. As Jesus said, "Why do you call me good? No one is good—except God alone." (Mark 10:18) A good Christian recognizes that they are not good, but rather, they are good because of Christ living in them.