Confess your sins not to the priest, but to the Lord Himself, only without hiding anything, from your whole heart. The priest is the mediator between you and God, and so the benefit of Confession depends on your open-heartedness.
Uniting ourselves with Christ, we receive divine grace which gives human nature strength for victory over sin and death, and the Lord Jesus Christ has shown people the way to victory over sin by His teaching, and He grants them eternal life, making them partakers of His eternal kingdom by His Resurrection. In order to receive that divine grace from Him the closest possible contact with Him is necessary. Drawing all to Himself by His divine love, and uniting them unto Himself, the Lord has united to each other those who love Him and come unto Him, uniting them into one Church.
You write that after Communion you felt well. Glory be to God, Who comforts our unworthiness. And as regards the fact that this soon passed, here also is seen His fatherly providence for us. For continual consolation enfeebles the soul and makes it slothful, or leads to even greater harm. That is why the Lord takes it away quickly and again makes us feel our weakness, our helplessness, and our sinfulness. We must humble ourselves more, reproach ourselves, offer repentance for our sins, and not desire consolations, but patiently endure what God allows. Dryness and cooling of fervor are also permitted on account of vainglory.
Repentance is real when afterwards you keep trying strenuously to live now as you ought; but without this it is not very effectual, if you repent just to say your sins & to keep on living as before.
