This is my longest series. I suggest those who read any of the posts read all of the series. Here is a great section from Garrigou-Lagrange on his own work. I am backtracking a bit, but some readers have plunged in at the end of the purification stage without looking at the whole. If one does not believe this holiness is the call of all men and women, do not bother to follow the series.
Follow the tags.
And, read St. Bernard of Clairvaux, as well as SS. John of the Cross, Teresa of Avila and others.
Lastly, it is of prime importance to remark that the normal way of sanctity may be judged from two very different points of view. We may judge it by taking our nature as a starting point, and then the position that we defend as traditional will seem exaggerated. We may also judge it by taking as a starting point the supernatural mysteries of the indwelling of the Blessed Trinity, the redeeming Incarnation, and the Blessed Eucharist. This manner of judging per altissimam causam is the only one that represents the judgment of wisdom; the other manner judges by the lowest cause, and we know how "spiritual folly," which St. Thomas speaks of, is contrary to wisdom.(44)
If the Blessed Trinity truly dwells in us, if the Word actually was made flesh, died for us, is really present in the Holy Eucharist, offers Himself sacramentally for us every day in the Mass, gives Himself to us as food, if all this is true, then only the saints are fully in order, for they live by this divine presence through frequent, quasiexperimental knowledge and through an ever-growing love in the midst of the obscurities and difficulties of life. And the life of close union with God, far from appearing in its essential quality as something intrinsically extraordinary, appears alone as fully normal. Before reaching such a union, we are like people still half-asleep, who do not truly live sufficiently by the immense treasure given to us and by the continually new graces granted to those who wish to follow our Lord generously.
By sanctity we understand close union with God, that is, a great perfection of the love of God and neighbor, a perfection which nevertheless always remains in the normal way, for the precept of love has no limits.(45) To be more exact, we shall say that the sanctity in question here is the normal, immediate prelude of the life of heaven, a prelude which is realized, either on earth before death, or in purgatory, and which assumes that the soul is fully purified, is capable of receiving the beatific vision immediately. This is the meaning of the words "prelude of eternal life" used in the title of this work.