What all three vows are about is availability: trying to make ourselves and our hearts as wide as they can be in order to respond to the needs of God’s world and his people and, as far as our human frailty allows us, remembering and trying to put into practice the words of St Teresa of Avila – 
“Christ has no body now on earth but yours, 
no hands but yours, 
no feet but yours. 
Yours are the eyes 
through which to look out Christ’s compassion to the world;
yours are the feet with which he is to go about doing good;
yours are the hands with which he is to bless 
men [and women] now.”

(Sr Jane Livesey is general superior of the Congregation of Jesus)