What was there before all this creation

Sutra 129 of the 10th Mandala of Riga-Veda

In the beginning in the state of flood there was neither matter nor non-matter, neither being nor non-being. At that time there was neither the sky nor the space nor anything beyond . There was no life anywhere nor any source of pleasure. What was there ? And where ? What was the power ? At that time even the solemn water did not exist. There was neither death nor immortality, neither night nor any notion of the day. At that time only one, i.e. Brahma, imbued with energy in his nature was there and nothing else existed. Darkness was hidden inside darkness and the existence was unknown. With the exertion of its own tapas, heat-energy, out of nothing emerged Brahma without external cause or action. This caused the conception of creation and the sages realized the cause of matter in non-matter. Who knows the entire truth and who can speak about this creation ? What are the causative factors of this creation ? The gods have originated after the creation. Who knows the one from which this world has got created. It is not known how this existence has come up. He only knows the one who has unveiled it. Does he bear it or not ? It is not known whether the lord up above knows it or not.