It says that one does not cease to be just. That means the bucket still has grace in it.
It does not say the bucket remains FULL or at the same level of grace.
Where does it say that the level of grace in the bucket is not declining due to venial sin? No place. …
I gave the citations in the prior posts from Trent, Catholic Encyclopedia, and Summa Theologicae that the
state of sanctifying grace is not lost by venial sins. That means countless venial sins.
Unrepented venial sin hinders the reception of graces God would otherwise give. Mortal sin “results in the loss of charity and the privation of sanctifying grace” note that it is privation not reduction.
It is not necessary to confess venial sins – that is only required for removal of eternal punishment not temporal punishment due sin. Indulgences remove temporal punishments due sin. Catechism 1472 has on the punishment of sin: “A conversion which proceeds from a fervent charity can attain the complete purification of the sinner in such a way that no punishment would remain.”
There is a difference between actual graces and the state of sanctifying grace. Quotes below I.
Also the charisms that you are referring to do not require a state of sanctifying grace. Quotes below II.
I. Catechism on grace
1863 … “Venial sin does not deprive the sinner of sanctifying grace, friendship with God, charity, and consequently eternal happiness.” …
2000 Sanctifying grace is an habitual gift, a stable and supernatural disposition that perfects the soul itself to enable it to live with God, to act by his love. Habitual grace, the permanent disposition to live and act in keeping with God’s call, is distinguished from actual graces which refer to God’s interventions, whether at the beginning of conversion or in the course of the work of sanctification.
Summa Theologiae > Third Part > Question 87. The remission of venial sin. Article 2. Whether infusion of grace is necessary for the remission of venial sins?:
I answer that, Each thing is removed by its contrary. But venial sin is not contrary to habitual grace or charity, but hampers its act, through man being too much attached to a created good, albeit not in opposition to God, as stated in I-II:88:1; II-II:24:10. Therefore, in order that venial sin be removed, it is not necessary that habitual grace be infused, but a movement of grace or charity suffices for its forgiveness.
II. Catechism on Charisms
2003 Grace is first and foremost the gift of the Spirit who justifies and sanctifies us. But grace also includes the gifts that the Spirit grants us to associate us with his work, to enable us to collaborate in the salvation of others and in the growth of the Body of Christ, the Church. There are sacramental graces, gifts proper to the different sacraments. There are furthermore special graces, also called charisms after the Greek term used by St. Paul and meaning “favor,” “gratuitous gift,” "benefit."53 Whatever their character - sometimes it is extraordinary, such as the gift of miracles or of tongues - charisms are oriented toward sanctifying grace and are intended for the common good of the Church. They are at the service of charity which builds up the Church.54
Council of Trent on the measure of grace given to each (Denzinger):
799 Justification itself follows this disposition or preparation, which is not merely remission of sins [can. II], but also the sanctification and renewal of the interior man through the voluntary reception of the grace and gifts, whereby an unjust man becomes a just man, and from being an enemy becomes a friend, that he may be “an heir according to hope of life everlasting” [Tit. 3:7].
The causes of this justification are: the final cause indeed is the glory of God and of Christ and life eternal; the efficient cause is truly a merciful God who gratuitously “washes and sanctifies” [1 Cor. 6:11], “signing and anointing with the Holy Spirit of promise, who is the pledge of our inheritance” [Eph. 1:13f.]; but the meritorious cause is His most beloved only-begotten Son, our Lord Jesus Christ, “who when we were enemies” [cf. Rom. 5:10], “for the exceeding charity wherewith he loved us” [Eph. 2:4], merited justification for us [can. 10] by His most holy passion on the wood of the Cross, and made satisfaction for us to God the Father; the instrumental cause is the sacrament of baptism, which is the "sacrament of faith,’’* without which no one is ever justified.
Finally the unique formal cause is the “justice of God, not that by which He Himself is just, but by which He makes us just” * [can. 10 and 11], that, namely, by which, when we are endowed with it by him, we are renewed in the spirit of our mind, and not only are we reputed, but we are truly called and are just, receiving justice within us, each one according to his own measure, which the “Holy Spirit distributes to everyone as he wills” [1. Cor. 12:11], and according to each one’s own disposition and cooperation.