The word salvation comes from the word save. Christians claim to be saved but really is such salvation guaranteed? Not at all, only the ones that endure to the end shall be saved (Matthew 24:23). Until then, nobody is saved yet it’s an acceptable claim to be saved because it is a process of working out one’s salvation.
Working out your salvation involves a lot of things but it can be summed up to keeping God’s commandments to the best of you capability. Solomon of old wrote that the entire duty of man is to fear God and keep His commands (Eccl. 12:13). The act of working out your salvation can be termed ‘living a holy life’, without which no man shall see the Lord (Hebrews 12:14).