I am certainly no critic but if you are looking to improve this amazing poem, only in my opinion I believe it would read easier if you would eliminate all of the inbetween if's from the poem and only put one at the beginning of each stanza to read like this.....
If....
words were said in the moment
time took a wondering pause
spring had sprung in a instance
Would we stop to wonder its cause?

In my personal opinion I believe that all of the if's distract the reader from reading this amazing poem. You have a lot of great words in here and have done an otherwise excellent job with this. Please keep in mind that it is only a matter of opinion to change that and it's entirely up to you. I am looking forward to reading more of your work and thank you again for such a wonderful comment.

Eloquently spoken, I like how you ask questions that leaves the reader wondering. Your flow is beautiful. You have quite the way with words. :)