Breathe...

The pensive reservation of the refrain is well balanced in this poem by the quickened pace you have achieved in the paired lines that I shall henceforth, for want of a quicker and better term, call couplets. Much of this celerity springs from the subtle ways in which the lines of the couplets mirror each other, in "Standing... precipice, Staring... abyss; raging, racing; comforting, welcoming". Where this effect is deficient, however, is in the thrid couplet, where I can discern no such technique. As a result, this couplet feels weaker than the others, and creates a negative bathos that breakes the building ebbs and flows of rhythmn you have created and leaves the ending underwhelming. If you could create some such effect in the third couplet, the poem would be rhythmically wonderful.

Besides this, I am a little unsure about the line break you have employed to create the final line of the poem. Whereas, on the one hand, I can see your desire to highlight the emphatic effect of your final word, but I also feel that this leaves the end of the second last line feeling mistakenly shorn and abrupt. I cannot see for myself a definitive way of altering this, but perhaps you shall have more luck if you think on it?

Sorry about the shorter comment on this one, but, well, it's a short poem.