And God tells us that where in Scripture? Show us the verses which require penance.
The Catholic god sure is all about inflicting pain and suffering on his people.
Gotta do penance, offer up your suffering to God for whatever, spend time in purgatory to "purge" your sins, etc.
6 For whom the Lord loveth he chastiseth: and he scourgeth every son whom he receiveth.
7 Persevere under discipline. God dealeth with you as with his sons. For what son is there the father doth not correct?
8 But if you be without chastisement, whereof all are made partakers, then are you bastards and not sons.
9 Moreover, we have had fathers of our flesh for instructors, and we reverenced them. Shall we not much more obey the Father of spirits and live?
10 And they indeed for a few days, according to their own pleasure, instructed us: but he, for our profit, that we might receive his sanctification.
11 Now all chastisement for the present indeed seemeth not to bring with it joy, but sorrow: but afterwards it will yield to them that are exercised by it the most peaceable fruit of justice.
12 Wherefore, lift up the hands which hang down and the feeble knees:
13 And make straight steps with your feet: that no one, halting, may go out of the way; but rather be healed [1].
The Catholic god sure is all about inflicting pain and suffering on his people.
I would suggest you meditate on the value of redemptive suffering.
[1] The Holy Bible, Translated from the Latin Vulgate. (2009). (Heb 12:5–13). Bellingham, WA: Logos Bible Software.