Do you ever feel like you're trying too hard to 'be spiritual' or to make a difference? This verse points to a different source of spiritual impact.
The core of this passage is that the aroma isn't ours, it's Christ's. We are the vessels through which this fragrance is released.
From Sacrifice to Sweetness
Paul, in the preceding verses, talks about God leading us in triumphal procession and spreading the knowledge of Him everywhere through us. This implies a life lived in submission to Christ's purposes.
Think of it like a beautiful perfume. The fragrance doesn't come from the bottle itself, but from the precious oils contained within. Our lives, when filled with and submitted to Christ, naturally give off the aroma of His presence and work.