-- Lk 21:29-33
The world, and man, attest that they contain within themselves neither their first principle nor their final end, but rather that they participate in Being itself, which alone is without origin or end. Thus, in different ways, man can come to know that there exists a reality which is the first cause and final end of all things, a reality "that everyone calls God".
-- CCC 34
Being seated at the Father's right hand signifies the inauguration of the Messiah's kingdom, the fulfillment of the prophet Daniel's vision concerning the Son of man: "To him was given dominion and glory and kingdom, that all peoples, nations, and languages should serve him; his dominion is an everlasting dominion, which shall not pass away, and his kingdom one that shall not be destroyed." After this event the apostles became witnesses of the "kingdom [that] will have no end".
-- CCC 664