Friends, the greatest concepts of physics are as following ie.
SPACE – L
TIME – T
MATTER – M
All the entities in the physics are expressed using the above three concepts ie. M L T.
Nothing can exist without M L T.
It is believed that from Nothingness the above three concepts are born.
Physics is considered as the study of Mother-Nature or something or anything Physical. And physics is incomplete without M L T.
Different proportion of M L T is what makes or gives rise to all entities in the whole COSMOS or Observable Universe so far.