When the reformers began to use the Scripture as a critical norm to flush out biases and problems in the development of the church, the Catholic Church was prompted to reflect on the question of its own position on the authority of the Bible. The understanding of Scripture and tradition became especially apparent at the First Vatican Council of 1869/70. This Council formulated two decrees, one on the Catholic Faith and the other on the Pope. Karl Rahner formulated the idea of sacred writers before anyone had even thought of Second Vatican Council in 1958. The Council had committed itself to a reform process that would put Scripture back into the centre of the church's life and mission. Liberation theology was a significant development which arose in the wake of the Second Vatican Council.