Chapter 14 — Part I: The Creed — Article XII: Life Everlasting
Section 4. The faithful, therefore, are to be informed that the words, life everlasting, signify not only continuance of existence, which even the demons and the wicked possess, but also that perpetuity of happiness which is to satisfy the desires of the blessed. In this sense they were understood by the lawyer mentioned in the Gospel when he asked the Lord our Saviour: What shall I do to possess everlasting life? as if he had said, What shall I do in order to arrive at the enjoyment of perfect happiness? In this sense these words are understood in the Sacred Scriptures, as is clear from many passages.