Whether Penance can be continuous?

Objections

Objection 1 : It would seem that penance cannot be continuous. For it is written (Jer. 31:16): "Let thy voice cease from weeping, and thy eyes from tears." But this would be impossible if penance were continuous, for it consists in weeping and tears. Therefore penance cannot be continuous.
Objection 2 : Further, man ought to rejoice at every good work, according to Ps. 99:1: "Serve ye the Lord with gladness." Now to do penance is a good work. Therefore man should rejoice at it. But man cannot rejoice and grieve at the same time, as the Philosopher declares (Ethic. ix, 4). Therefore a penitent cannot grieve continually for his past sins, which is essential to penance. Therefore penance cannot be continuous.
Objection 3 : Further, the Apostle says (2 Cor. 2:7): "Comfort him," viz. the penitent, "lest perhaps such an one be swallowed up with overmuch sorrow." But comfort dispels grief, which is essential to penance. Therefore penance need not be continuous.