How do we know that death is a necessary part of life for Christians?

Scripture confirms that death is an unavoidable reality for every person. Hebrews 9:27 states, 'It is appointed unto men once to die, but after this the judgment.' This reflects the biblical teaching that death is a part of the created order due to sin entering the world. However, for Christians, death is not to be feared. Rather, as Paul writes, 'for me to live is Christ, and to die is gain' (Philippians 1:21), indicating that death leads to eternal fellowship with God. Thus, facing death is not merely a grim conclusion but an opportunity to enter into the fullness of life promised in Christ.