28 In this Holy Catholic Church receiving instruction and behaving ourselves virtuously, we shall attain the kingdom of heaven, and inherit eternal life; for which also we endure all toils, that we may be made partakers thereof from the Lord. For ours is no trifling aim, but our endeavour is for eternal life. Wherefore in the profession of the Faith, after the words, “And in the resurrection of the flesh,” that is, of the dead (of which we have discoursed), we are taught to believe also “in the life eternal,” for which as Christians we are striving.
Source: Catechetical Lectures (New Advent)