Om is the mysterious cosmic energy that is the substratum of all the things and all the beings of the entire universe. It is an eternal song of the Divine. It is continuously resounding in silence on the background of everything that exists.
Those may justly be reckoned void of understanding that do not bless and praise God; nor do men ever rightly use their reason till they begin to be religious, nor live as men till they live to the glory of God. As reason is the substratum or subject of religion (so that creatures which have no reason are not capable of religion), so religion is the crown and glory of reason, and we have our reason in vain, and shall one day wish we had never had it, if we do not glorify God with it.matthew henry
The complete closed world consists of three parts-substratum, phenomenal world, and observer. By our experiments we drag up activities from the substratum into the phenomenal world of space and time , but there is no clear line of demarcation between subject and object, and by performing observations on the world, we alter it, much as a fisherman dragging up fish from the depths of the seas disturbs the waters and also damages the fish.james jeans
All the manifested world of things and beings are projected by imagination upon the substratum which is the Eternal All pervading Vishnu , whose nature is Existence- Intelligence ; just as the different ornaments are all made out of the same gold.