This study has two parts. The first one analyses testimony from the point of view of Scripture, the Fathers, the Second Vatican Council and some post-conciliar documents (the Catechism of the Catholic Church, the encyclical Novo millennio ineunte, by John Paul III and the encyclical Deus caritas est, by Benedict XVI). The second part presents a contemporary reflection on testimony, outlining a series of themes. Starting with testimony as a dimension of theology itself, this paper then looks as the relations between faith, testimony and experience, the testimony of Christ and Christian experience, and, finally the place for testimony in relation with the Church, the transmission of faith, worship and charity. [ABSTRACT FROM AUTHOR]