A holy life will produce the deepest impression.  Lighthouses blow no horns; they only shine.

From Titus 2:7:  “In all things, offering yourself as a model of good works and in your teaching offering integrity.”

D. L. Moody (1837-1899), also known as Dwight Lyman Moody, was an American evangelist and Christian teacher.  He is frequently credited with inspiring modern mass revivalism.