A holy life is a voice—it speaks when the tongue is silent and is either a constant attraction or a perpetual reproof.
Holiness is not the way to Christ, but Christ is the way to holiness.
Jesus has been talking about
how we are to treat little ones in this passage,
how we are to treat those who are weak in faith and life,
how we are to reach out to them and care for them and be concerned for them.