When we tell others about Jesus, to God it is fragrant. But to a non-Christian it is an awful smell of death.
2 Corinthians 2:
14 But thank God! He has made us his captives and continues to lead us along in Christ’s triumphal procession. Now he uses us to spread the knowledge of Christ everywhere, like a sweet perfume. 15 Our lives are a Christ-like fragrance rising up to God. But this fragrance is perceived differently by those who are being saved and by those who are perishing. 16 To those who are perishing, we are a dreadful smell of death and doom. But to those who are being saved, we are a life-giving perfume. And who is adequate for such a task as this?