Biblical Answer

The difference between a good Christian and someone who's given up is that a good Christian prioritizes their relationship with Christ over everything, including their own desires and passions. They put the Lord Jesus over their passions, possessions, and the other things that hold them back from a deeper relationship with God. This is in contrast to someone who's given up, who may still be trying to be good but is not motivated by a desire to follow Christ.

A good Christian is someone who has taken the distinction between good and bad very seriously, and has recognized that true goodness comes from God. They are not motivated by a desire to please others or to earn their approval, but rather by a desire to please God and follow His will. This is in contrast to someone who's given up, who may be motivated by a desire to fit in or to avoid conflict, but not by a desire to follow Christ.

A good Christian is someone who is enabled to repent and pick themselves up and begin again after each stumble, because they have the Christ-life within them. They are not perfect, but they are striving to live a life that reflects their faith in Christ. This is in contrast to someone who's given up, who may be stuck in their sin and unable to move forward. A good Christian is someone who is pressing on toward the goal for the prize of the upward call of God in Christ Jesus, and is not satisfied with the spiritual or moral status quo. They are always striving to grow and deepen their relationship with God, and to live a life that reflects their faith in Christ.