‘I would willingly endure alone all the sufferings of this world to be raised a degree higher in Heaven and to possess the smallest increase of the knowledge of God’s greatness.’
St. Teresa of Jesus
'The Holy Gospel says of the elect: “In my Father’s house there are many mansions.” Now, if the righteous in that eternal blessedness enjoyed its good things in the same way, then there would be reason to believe that there is but one mansion, not many. However, there are many mansions in which the elect will be distributed, according to their worthiness, that they might together rejoice and be glad.
The fact that all of the chosen who are distributed among the different mansions receive only one coin shows that there is but one blessedness, enjoyed by all of those who are saved; the amount returned to each of the elect, however, differs according to the various works of virtue that they performed.’
Pope St. Gregory the Great
"There are various degrees of beatitude in heaven corresponding to the various degrees of merit. This is a dogma of faith, defined by the Council of Florence (Denz., n. 693 Eold, n. 588). The Bible teaches this truth in very many passages (e.g., wherever it speaks of eternal happiness as a reward), and the Fathers defend it against the heretical attacks of Jovinian. It is true that, according to Matthew 20:1-16, each labourer receives a penny; but by this comparison Christ merely teaches that, although the Gospel was preached to the Jews first, yet in the Kingdom of Heaven there is no distinction between Jew and Gentile, and that no one will receive a greater reward merely because of being a son of Judah. The various degrees of beatitude are not limited to the accidental blessings, but they are found first and foremost in the beatific vision itself. For, as we have already pointed out, the vision, too, admits of degrees. These essential degrees of beatitude are, as Francisco Suárez rightly observes (“De beat.”, d. xi, s. 3, n. 5), that threefold fruit Christ distinguishes when He says that the word of God bears fruit in some thirty, in some sixty, in some a hundredfold (Matthew 13:23). And it is by a mere accommodation of the text that St. Thomas (Supp:96, aa. 2 sqq.) and other theologians apply this text to the different degrees in the accidental beatitude merited by married persons, widows, and virgins.
The happiness of heaven is essentially unchangeable; still it admits of some accidental changes. Thus we may suppose that the blessed experience special joy when they receive greater veneration from men on earth. In particular, a certain growth in knowledge by experience is not excluded; for instance, as time goes on, new free actions of men may become known to the blessed, or personal observation and experience may throw a new light on things already known. And after the last judgment accidental beatitude will receive some increase from the union of soul and body, and from the sight of the new heaven and the earth.
In heaven there is not the least pain or sadness; for every aspiration of nature must be finally realized. The will of the blessed is in perfect harmony with the Divine will; they feel displeasure at the sins of men, but without experiencing any real pain.
They delight greatly in the company of Christ, the angels, and the saints, and in the reunion with so many who were dear to them on earth.
Very special joys are granted to the martyrs, doctors, and virgins, a special proof of victories won in time of trial (Revelation 7:11 sq.; Daniel 12:3; Revelation 14:3 sq.). Hence theologians speak of three particular crowns, aureolas, or glorioles, by which these three classes of blessed souls are accidentally honoured beyond the rest. Aureola is a diminutive of aurea, i.e. aurea corona (golden crown). (Cf. St. Thomas, Supp:96.) "
- “The Catholic Encyclopedia”, “Heaven”