The material world is conducted by three gunas, means the quality of goodness, the quality of passion, the quality of ignorance, and mixed. So first, second, third, and the mixed is called fourth. That is called varnasrama: Revision history
Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.