I think it's because literally everything one does is a part of one's spiritual path not just what what does on Sunday but literally everything one thinks and does during each and every day. But, most people might not think of it in that way.
Forgiving yourself and others is also a part of one's spiritual path.
If you are busy punishing yourself or others for some perceived wrong all the time then you are going in the wrong direction.
In the end being kind to yourself and others is one of the only really useful paths there is.
The question then becomes how much bliss can you and others (every being in the Universe experience?
Bliss and peace are very much alike but not in a boring way, but instead in a peaceful happy way.
