To go

soheil1Past went what has past on. We will jump at any opportunities occurring to us from now on.

The whole thing sounds odd to my ears. Both past and went refer to past!

The first sentence is not clear.
I would say the second sentence, "We will make use of every opportunity that comes to us from on."

soheil1We will jump at any opportunities occurring to us from now on.

Try this: From now on, we will jump at every opportunity that comes our way.

It's not clear what the first sentence is supposed to mean. Could you please paraphrase it?

whatever has past is past.

Is 'come one's way' an expression?

soheil1whatever has past is past.

The word 'past' is an adjective here, so it should be: "What is past is past."
However, I imagine you could also say: "What has passed is past."

soheil1Is 'come one's way' an expression?

Yes.

What about

Past is whatever has past on. We will jump at every opportunity coming our way from now on.?

soheil1Past is whatever has past on.

Is the first 'past' supposed to be a noun and the second a past participle?

soheil1We will jump at every opportunity coming our way from now on.?

This is not so natural as the version I suggested earlier.

'On' at the end of the two sentences rhyme with each other, isn't it?

What about:
Passed away whatever has past on. We will jump at every opportunity from now on.

soheil1'On' at the end of the two sentences rhyme with each other, isn't it?

Are you writing a poem?

soheil1Passed away whatever has past on.

That doesn't make much sense to me, but maybe someone else could make some sense out of it. Oh, and 'past' is definitely not the right word.