Into the light's dark
On a passage one must embark

That rhyme seemed very forced.

Your second stanza was the strongest to me, and your use of contrasts brought a good view of your main point. It seems like an arguement, yet isn't stated with an arguementative tone. I think that the ending could have been stronger, but there aren't many lines that were out of place which is good, especially in a poem that uses rhyme as much as yours did. Most of the time an entire poem will either lie on cliche or the rhyme will be so forced, so repetitively that the poem is then ruined. And like I said, your contrast was good, but I think it might improve your poem if you describe things a little more and use the full extent of your creativity.