Below, you'll see any text that was highlighted with comments from the reviewer.
I'd tell them it's about how important it is to be with people during the good times and prevent them from falling into that self-defeating narrative and to help them to progress and become better individuals. Preventative measures are more important when trying to stop people from changing in an adverse way.
There are so many! Your choice of topic is really interesting and your structure is also excellent - however, it's the language that really, really drew me in. You write so beautifully, and your blend of frank points and poetic crafting of phrases was really well-achieved. I especially liked your description in relation to the shower, because you picked a certain mood or theme that would run throughout and the language you used adhered to that. Consequently, it had a massive effect on me when I first read it.
I think you sometimes forget that we aren't as familiar with the idea as you are (given that you've clearly been thinking over it) so we need more background to the idea and sometimes the different aspects need to be stated in more simple terms. For example, could you clarify 'people change in the nicest of times. When they've made the decision to change themselves, they're already lost'? I didn't feel that this related really to what I'd read into the rest of the text - although that could, of course, be my error. There were a few other areas in which I thought some further elaboration on the point could be effective, for example 'not when they are that person' and 'be careful with your words, your actions, your presence'.
Well done - you're clearly a very talented writer who has a really good sense of how words can fit together to have a powerful effect. I look forward to seeing more of your work on the site in future.