What is Prayer?
Compendium of the Catechism of the Catholic Church, Paragraph 534

Prayer is the raising of one’s mind and heart to God, or the petition of good things from Him in accord with His will. It is always the gift of God who comes to encounter man. Christian prayer is the personal and living relationship of the Children of God with their Father who is infinitely good, with His Son Jesus Christ, and with the Holy Spirit who dwells in their hearts.

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“A catechism should faithfully and systematically present the teaching of Sacred Scripture, the living Tradition of the Church and the authentic Magisterium, as well as the spiritual heritage of the Fathers and the Church’s saints, to allow for a better knowledge of the Christian mystery and for enlivening the faith of the People of God. It should take into account the doctrinal statements which down the centuries the Holy Spirit has intimated to his Church. It should also help illumine with the light of faith the new situations and problems which had not yet emerged in the past…the Catechism of the Catholic Church on the one hand repeats the old, traditional order already followed by the Catechism of St Pius V, arranging the material in four parts: the Creed, the Sacred Liturgy, with pride of place given to the sacraments, the Christian way of life, explained beginning with the Ten Commandments, and finally, Christian prayer. At the same time, however, the contents are often expressed in a new way in order to respond to the questions of our age. ”  (Apostolic Constitution Fidei Depositum on the Publication of the Catechism of the Catholic Church Prepared following the Second Vatican Ecumenical Council, 11 October 1992)