Ideas

God The Creator of the Cosmos (from the Catechism)

The Existence of God

In brief - When he listens to the message of creation and to the voice of conscience, man can arrive at certainty about the existence of God, the cause and the end of everything. (46)
The Church teaches that the one true God, our Creator and Lord, can be known with certainty from his works, by the natural light of human reason. (cf. Vat I, Can 2) (47) In more detail

Creation

In brief - God created the world to show forth and communicate his glory. That his creatures should share in his truth, goodness and beauty - this is the glory for which God created them. (319)
God willed the diversity of his creatures and their own particular goodness, their interdependence and their order. He destined all material creatures for the good of the human race. Man, and through him all creation, is destined for the glory of God. (353)
In the creation of the world and of man, God gave the first and universal witness to his almighty love and his wisdom, the first proclamation of the ‘plan of his loving goodness’, which finds its goal in the new creation in Christ. (315)