Burnt offerings carried aromas as they were sacrificed.
Those that spread the knowledge of Christ are as an aroma before the very Creator of the sense of smell.  Selah

But thanks be to God!

For in union with Christ we are always led by God as prisoners in Christ’s victory procession.

God uses us to make the knowledge about Christ spread everywhere like a sweet fragrance.

For we are like a sweet-smelling incense offered by Christ to God, which spreads among those who are being saved and those who are being lost.

For those who are being lost, it is a deadly stench that kills; but for those who are being saved, it is a fragrance that brings life. Who, then, is capable of such a task?