'Fragrance' in the Bible

and to God are thanks, who at all times is leading us in triumph in the Christ, and the fragrance of His knowledge He is manifesting through us in every place,

because of Christ a sweet fragrance we are to God, in those being saved, and in those being lost;

to the one, indeed, a fragrance of death to death, and to the other, a fragrance of life to life; and for these things who is sufficient?