Alright, long time lurker, but finally found an unsolved puzzle that I figured out the answer to in order to create an account. :P
As @DavidFoong mentioned, the answer is indeed pi. The steganography in the puzzle relates to the first letter of each line and its corresponding A1Z26 number. Each digit of pi adds its value to the previous letter to make the next letter, i.e.:
C = 3
D = 3+1
H = 3+1+4
I = 3+1+4+1
N = 3+1+4+1+5
W = 3+1+4+1+5+9
Y = 3+1+4+1+5+9+2
E = 3+1+4+1+5+9+2+6 (Looping back around from Z26 to A1)
...
S = 3+1+4+1+5+9+2+6+5+3+5+8+9+7+9+3+2+3+8+4+6
Which when removing the + signs (and adding a period) gives us 3.14159265358979323846, the (approximate) value of pi!
Along with this, the puzzle also includes several side clues to lead us to the answer. @DavidFoong has most of the side clues solved, so check out his answer for those. The couple that he missed are:
Even if it cannot divide the magic shape
Due to pi being an irrational number, it cannot be divided by a division sign (e.g. 22/7, where 22 and 7 are divided by /).
Do not worry, stanzas are only for beauty
Go for where you start from, and you will see
The text is (mostly) filler, with some hints mixed in. Where you're starting from is the start of the sentence.
You really need not suspect the entire being
Because the crucial part lies in one silver lining
This refers to the block of text itself, i.e. you don't need to read all the text, just the letters that lie along the line on the left made by the blockquote.