Abstract
"Scripture alone, faith alone, grace alone"! The Reformation asserted nothing more and nothing less. This essentiality echoed as a cry of revolt at a time when the Church had lost its way. But does it still have some relevance today? The diffusion of the Bible is universal, faith is accessible online and grace is inexhaustible since the Second Vatican Council! What contribution could Protestantism, which is celebrating its five hundredth anniversary this year, accomplish in the field of ecumenical and islamo-christian dialogue?