I love love LOVE it. However in the lines:
"It’s one thing to help
Without lending a hand
Another thing to know
When just to stand",
I think if you took out the "thing" in the third line, it would make that part flow better, because that's what you did in the rest of the poem.
It all sounds excellent. The last line is my favorite, and it's so perfect. It goes perfectly with the rest of the poem. It reminds me of my poem "Average". The last stanza in your poem is one of those stanzas that, when taken out of the whole poem, it loses it's impact, which is why it has such an impact when you read the whole poem through to the end, and add that twist of the last line.
Yes, that was a run-on. I'll admit it.

Loopy