Bazen "Su" olmak lazım,sessiz sakin!

Bazen "Sel" olmak lazim.öfkeli ve hırçın!

Bazen "Mum" alevi olmak lazim,sabırla tükenmeyi bekleyen!

Bazense "Volkan" olmak lazım,önüne gelen herseyi hızla tüketen!

Kimine su olacaksın.

Mimine sel.

Kimine mum olacaksın,kimine volkan.

Ama kimseye "KUL" olmayacaksi 

My Try:

´Sometimes you have to be water, silent and calm.

Sometimes you have to be flood of water, angry and rough.

Sometimes you have to be the flame of a candle, patiently waiting to run out.

Sometimes you have to be a volcano, exhausting rapidly what came before.

For whom will you be water,

for whom the flooding water,

for whom will you be the candle, for whom the volcano.

But you won´t be a slave for any one.´

____________

Question: is the kimine - mimine doublet here the same as in fakatı makatı yok or in bahçede ağaç mağaç yok?

Most probably, "mimine " in that poem is just a typing error.

it should be "kimine"

What a disappointment. I never saw it in real life.

 Great try! I am only pointing out a few things as you are a keen learner.

tüketmek means to exhaust, but it can also be consume or eat up.

önce is before. önüne is in front of.

Rapidly consuming everything in front of it

or

Rapidly consuming everything in its path

 I would have been a bit more fluid in the English translation:

you will be water for some

you will be a flood for some

...

but you will never be anyone´s slave

or

you will behave like water towards some people

you will behave like a flood towards some people

...

but you will never behave like a slave to anyone