Immense is This Reward. How Shall We Obtain It?
How blessed and wonderful, beloved, are the gifts of God! Life in immortality, splendour in righteousness, truth in perfect confidence, faith in assurance, self-control in holiness! And all these fall under the cognizance of our understandings [now]; what then shall those things be which are prepared for such as wait for Him? The Creator and Father of all worlds, the Most Holy, alone knows their amount and their beauty. Let us therefore earnestly strive to be found in the number of those that wait for Him, in order that we may share in His promised gifts.
But how, beloved, shall this be done? If our understanding be fixed by faith towards God; if we earnestly seek the things which are pleasing and acceptable to Him; if we do the things which are in harmony with His blameless will; and if we follow the way of truth, casting away from us all unrighteousness and iniquity, along with all covetousness, strife, evil practices, deceit, whispering, and evil-speaking, all hatred of God, pride and haughtiness, vain glory and ambition. For they that do such things are hateful to God; and not only they that do them, but also those that take pleasure in them that do them. For the Scripture says, “But to the sinner God said, Wherefore do you declare my statutes, and take my covenant into your mouth, seeing you hate instruction, and castest my words behind you?
When you saw a thief, you consented with him, and made your portion with adulterers. Your mouth has abounded with wickedness, and your tongue contrived deceit. You sit, and speak against your brother; you slander your own mother's son. These things you have done, and I kept silence; you thought, wicked one, that I should be like to yourself. But I will reprove you, and set yourself before you. Consider now these things, you that forget God, lest He tear you in pieces, like a lion, and there be none to deliver. The sacrifice of praise will glorify me, and a way is there by which I will show him the salvation of God.”
Source: First Epistle (New Advent)