John H. Leith wrote,
Evangelism in the Reformed tradition can only be conceived in simple, direct, and unadorned fashion....[A]ny attempt to overwhelm is off-limits. The rhetoric of Reformed evangelism will be primarily its content, not the medium of its expression. The medium will express, not obscure, the content. It will seek to convince, not to beguile.
Leith could have just dropped talk of the "reformed tradition," for he is describing evangelism as the Bible describes it (1 Cor 2:1-5).
I'm sure Rosaria could teach us a great deal about evangelism, but more importantly, we have the Spirit of Christ to enable us to proclaim Christ and to draw others to the life of Christ. May the Spirit do his convincing work through us this year!