Prayer is a source of holiness and missionary work; Jesus says (Jn 15:5) ‘without me you can do nothing’. In chapter 15, John clearly states that Jesus is the vine and that the Father is the planter. He is the source of life and spiritual development; this is what preaches the relationship of the Holy Trinity... Catechesis on ‘Prayer and the Holy Trinity’, in collaboration with P. Germain Thierry Randriamiarantsoa.