The renewal of the Liturgy is not done for fashion but for deep and fundamental reasons (grace, communion, faith). It is necessary to be careful with the truth of doctrine and respect for sacred tradition; the Church preserves the spiritual heritage, a document collected in accordance with the law. Before reforming, a multifaceted study is carried out... Catechism on the Reformation of the Liturgy, with P. Randriamanamahenina Robert Marie.