If it is important to live according to the gospel, it is important to understand it. Jesus provides the foundation of the gospel, which is his atoning sacrifice. That sacrifice opens the possibility of repentance, and repentance will allow humankind to change and improve, and therefore stand “guiltless before [the] Father” in the final judgment.
The important aspect of repentance is that it should lead to a real change. Serial repentance of the same error is not the definition of living the Gospel. The requirement is to endure to the end. We endure in the sense that we keep going, not in the sense of suffering. The Gospel is consistently described as bringing joy. Thus, the association of endurance as something hard to bear is not the image that is being projected. It is the continuance, the perseverance, the continuation to repent as a means of improvement, that we may achieve the promised ultimate joy.