The implication in the question suggests that you have an inner inclination to recognize worldly suffering. From my experience, whilst this was a tough undertaking, it was a necessary part of my practice. I had been drawn to hold the world's suffering and not just at the planes of materiality but down into the collective human unconscious - literally going through the hell realms. In Zen terms this is called The Great Doubt. It had led to a great, unfounded compassion and an understanding of the suffering of others in all situations and at different levels.
I could go into more detail with that, but it would drown out the focus of this answer. Suffice to say, that one does not necessarily need to 'pain' themselves to such a degree, but that one makes a sign of recognition to the suffering of other beings in a way that is conducive to your current karmic structure. The thing about the karmic structure is that we cannot really know where our practice will take us; it is different for everyone. But there are universals that show themselves from time to time and that is why we have a context - like Buddhism - where other travellers who have fared the road leave clues, markers, and little signs written on scraps of cardboard.
I don't know anything about the seven-line prayer, but briefly scanning over it suggests that it promotes great reverence towards a particular guru. I was never drawn into salivating over teachers in this way. The point is to find your own reliance and not become hazed by someone else's idea of what a path is - no matter what robes they wear or what lineages they bonk you on the head with. These things are only fluff sprinkled with glitter.
Now, ask yourself: is it sincerely possible to focus your efforts onto a single practice with the goal of stream-entry?... No! No! No...
The Japanese Zen Master, Hakuin, points this out with succinct beauty:
“People see it as if it is far away. What a pity! They are like a man
who, standing in water, complains of thirst”