In your struggle against sin, you have not yet resisted to the point of shedding your blood. And you have forgotten that word of encouragement that addresses you as sons: "My son, do not make light of the Lord's discipline, and do not lose heart when he rebukes you, because the Lord disciplines those he loves, and he punishes everyone he accepts as a son." Hebrews 12:4-5
In the context of the previous chapter and the first three verses of this chapter, we see that we are able to resist our struggles against sin. In the vernacular. this could be translated, "you have all the power in the world to help you when you're struggling. You have the saints before you cheering you on, so stop complaining that you can't live this Christian life to the fullest. You probably haven't resisted enough, so keep resisting. Further, many have sacrificed their lives for you (shed their blood), so yes, you can struggle and resist temptations and sin."
What is that one area of temptation or sin that the previous verse talked about, the sin that so easily entangles? How are you resisting that?
1 Corinthians 10:13 states, "No temptation has seized you except what is common to man. And God is faithful; he will not let you be tempted beyond what you can bear. But when you are tempted, he will also provide a way out so that you can stand up under it."