I know a lot of this forum is to do with a particular kind of penance, but it might also be worth visiting another kind, and providing some suggestions to those who want to do something, but are uncertain about dipping their toe into these rather scarey looking waters.
So I thought it might be useful to give some examples of penance that may take time and effort, but do not include physical pain or discomfort. And I would very much welcome suggestions from other people.
I would start with one comment about prayer. Among other daily prayers, I have found it useful (and quite challenging to remember) to say the Lord's Prayer at certain times; on waking or going to bed, when going out of the house or entering it, and in particular before eating or drinking anything. The number of times I have found myself half way through a cup of tea, and realised that I have forgotten, yet again. When I do, I smile, put the cup down, say the prayer to myself quietly, and carry on.
The reason for this is to remind myself of God's mercy and generosity to me. And my failing shows me how often I take what he gives me for granted. This in turn reveals my lack of gratitude in general for the country I live in, its relative wealth, and my relative wealth within it.
And related to that cup of tea is temperance. I think it was Ignatius again who said, decide just after a meal what you will take for your next. Not when you are hungry, in other words. That is very useful advice.
One last one; respect for all life. I find it is a very good discipline to respect all life as being as valuable as my own. When I am walking I will avoid treading on insects, and if I get flies or spiders in the house I will try to put them outside, rather than killing them. I don't always manage to do this, but I try. I remember how small and insignificant I am before God, but how he cares for me, and I try to reflect that in my attitude to those creatures that are insignificant to me. The blessed Francis has a lot to teach us; I think Christians are prone to take other animals for granted.
