A poem from Khayyam when he says:

در گوشِ دلم گفت فَلَک پنهانی

حُکمی که قضا بود زِ من میدانی

در گردشِ خویش اگر مرا دست بُدی

خود را بِرَهاندَمی زِ سَرگردانی

In the ear of my heart, the cosmos whispered stealthily, The fate that is written, you take as it is from me.

Had I control over my own orbit, I would free myself from wandering.

Kkayyam is saying that the whole universe said to him in whisper, that he does not control over his own orbit, how do you blame him for your fate and fortune?

In ancient times, it was believed that one could predict the fate of humans based on the positions of the stars, a belief that the sage Omar Khayyam, as an astronomer, refutes with this Rubaei. When the stars and planets of the sky revolve according to precise programs and laws, having no will of their own, how can we, who are nothing in comparison, have any control in this external world?

All our choices return to our inner world. The inner world is the abode of emotions, discoveries, wisdom, knowledge, and most importantly, love. It is in the external world that we are born, grow old, and die. In fact, like a bewildered fly, we circle for a while and then perish. But if we look within, we will discover who we truly are, where we have come from, and what our coming has been for. We will find that life is not just a few days in this world and will continue as long as God reigns. It is the inner world that determines our existence in heaven or hell, not the external world.

Therefore, as long as we are lost in confusion and bound by the egoistic mind that seeks external factors, we will not find the opportunity to return within and taste true happiness.