But if we walk in the light as he is in the light, we have fellowship with one another, and the blood of Jesus, his Son, purifies us from all sin. 1 John 1:7
The blood of Jesus purifies us from all sin. That's essentially the Gospel message in a concise sentence. Men, women, and children all over the world have died horrible deaths because of that one sentence. They have risked everything to proclaim that simple message.
The upside to that is that many lives have been radically changed because of the words in that solitary sentence. Marriages have been rebuilt, addictions have been conquered, rivers full of tears have been shed, and thick chains have been loosened because of that sentence.
Without the reality of those words, all bets are off for mankind's continued existence.
But thankfully – thankfully – those words are real.