KATHOPNISHADA CHAPTER 6 SHLOKA -2

                                                            यदिदं किं च जगत् सर्वं 

                                                            प्राण एजति निःसृतम् । 

                                                              महद्भयं वज्रमुद्यतं 

                                                       य एतद्विदुरमृतास्तेभवन्ति ॥ २

                                         TAD IDAM KIM  CHA JAGAT  SARV

                                                PRAN  EJATI  NIHSRUTAM|

                                    MAHAD  BHAYAM  VAJRAM  UDYATAM 

                               YA ETAD  VIDUR  AMRUTASS TE  BHAVANTI 2

THE WHOLE UNIVERSE EVOLVED FROM THE BRAHMAN, MOVES IN PRANA 

                THE BRAHMAN IS GREAT  FEAR AND LIKE THUNDERBOLT -

                          THOSE WHO KNOW THIS BECOME IMMORTAL.

      This is very interesting Shloka. We all know that Universe originated from the Brahman. So we are told about it ,but we are also told that it VIBRATES in Prana I think there are couple of points here . One is that the Universe VIBRTAES. We know that in this universe everything moves ,The earth and planets move around the Sun  and then the our solar system moves around a bigger star in galaxy and so on . This is at Macro level . But even at Micro level in atom there is nucleus and then electrons move around it. Even if one thinks of string theory, there is VIBRATION. I think vibration indicates something which is not BRAHMAN. The Brahman CANNOT move as there is no place where it is not present . For vibration one must be localized toa place and then moves . So the universe vibrates. The second point is that it moves in PRANA- i would consider Prana as energy and as we know from the modern day physics there is energy with atom where there is movement of subatomic particles. . We are also told that the BRAHAMAN is fearful and is like thunderbolt . There are laws in nature  and one must understand and follow them The fire burns and is hot and if you touch fire you will get burns . The law of gravity is well known. If one jumps from 3 rd. floor balcony you will fall hard  and if you jump from 10th floor balcony you will fall harder and may die. So the Laws of universe are to be feared about . And they will hit you like thunderbolt if you don't follow them . 

    So the universe originates in Brahman, it is in constant motion and there are laws that govern the universe and if one does not follow them you will be hurt.. One who knows this about the BRAHMAN , is free or becomes IMMORTAL. 

    One other explanation is based on Bhagwat Geeta. There is VISHWAROOP Darshan, where Lord Krishna shows the VIRAT or vast and crude ROOP and then Arjuna wants him to go back to the original appearance of KRISHA as his friend  and not as BRAHMAN which was fearful. This is in chapter xi and them the explosion of first atom bomb was comapred to that or 1000 of suns shining at the same time -this will be like thunderbolt.