53 Wherefore this do ye, virgins of God, this do ye: follow ye the Lamb, wherever He shall have gone. But first come unto Him, Whom you are to follow, and learn, in that He is meek and lowly of heart. Come ye in lowly wise unto the Lowly, if you love: and depart not from Him, lest ye fall. For whoso fears to depart from Him asks and says, “Let there not come to me foot of pride.” Go on in the way of loftiness with the foot of lowliness; Himself lifts up such as follow in lowly wise, Who thought it not a trouble to come down unto such as lay low.
Commit ye His gifts unto Him to keep, “guard ye your strength unto Him.” Whatever of evil through His guardianship ye commit not, account as forgiven unto you by Him: lest, thinking that you have little forgiven unto you, you love little, and with ruinous boasting despise the publicans beating their breasts. Concealing that strength of yours which has been tried beware, that you be not puffed up, because you have been able to bear something: but concerning that which has been untried pray, that you be not tempted above that you are able to bear.
Think that some are superior to you in secret, than whom you are openly better. When the good things of others, haply unknown to you, are kindly believed by you, your own that are known to you are not lessened by comparison, but strengthened by love: and what haply as yet are wanting, are by so much the more easily given, by how much they are the more humbly desired. Let such among your number as persevere, afford to you an example: but let such as fall increase your fear. Love the one that you may imitate it; mourn over the other, that you be not puffed up. Do not ye establish your own righteousness; submit yourselves unto God Who justifies you. Pardon the sins of others, pray for your own: future sins shun by watching, past sins blot out by confessing.
Source: On Holy Virginity (New Advent)