Define Sat.

"Sat" is a profound philosophical concept in various Indian traditions, including Vedanta and Buddhism. The term is derived from the Sanskrit root "as," meaning "to be" or "to exist." It encapsulates the essence of existence and reality.

1. Vedantic Perspective:
   In Vedanta, "Sat" is often used in conjunction with "Chit" (consciousness) and "Ananda" (bliss) to describe the nature of ultimate reality or Brahman. "Sat" represents the aspect of existence or being, highlighting the eternal, unchanging, and absolute nature of reality.

2. Buddhist Perspective:
   In Buddhism, especially in Mahayana traditions, the concept of "Sat" is explored in the context of emptiness or "Shunyata." Here, "Sat" refers to the ultimate reality beyond conceptualization, devoid of inherent existence. It signifies the true nature of all phenomena, emphasizing their dependent and interdependent nature.

3. Ontological Significance:
   "Sat" is not merely a descriptive term but carries ontological significance, representing the substratum of all that is real and enduring. It transcends the dualities of existence and non-existence, pointing to a deeper, unchanging reality that underlies the transient world of appearances.

In essence, "Sat" encompasses the fundamental principle of existence, emphasizing the timeless and unchanging nature of reality that underlies the ever-changing phenomena of the manifest world. It invites contemplation on the nature of being and the quest for understanding the ultimate truth beyond the veil of appearances.