Who it is possible: Simultaneously one (same) and many (different)? In two dimension, or in narrow view generally it is not possible. And same time from broad minded point of view, from three or more dimension point of view it is possible. This philosophy (Sanskrit:acintya-bhedabheda-tattva) are widely explained and shown by Indian Philosopher and Spiritual movement leader Chaitanya Mahaprabhu(1486–1534) [wikipedia link].
Three practical examples:
- If the figures: circle, ball and pyramid is the some? In the fixed shadow projection on to the table we can see all figures as same figure – circle. In this angle, there are the same. And same time we by our knowledge know – they are different. It is mean, figures: circle, ball and pyramid is the one-some and different simultaneously. (Science of mathematics-geometry)
- The father creates or begets a son, and the son also creates his other sons, and all of them may be one as human beings, but at the same time from the father, the son and the grandsons are all different. The son cannot take the place of the father, nor can the grandsons. As human beings they are one, but as relativities they are different. (Srimad Bhagavatam 2.9.33p)
- In this regard, the example of milk and yogurt is given. Yogurt is actually nothing but milk, but at the same time it is not milk. It is simultaneously one with milk yet different from it. (Sri Caitanya Caritamrta Madhya 9.360)