All the different branches of Indian philosophy are indebted to the Samkhya system for its in-depth analysis. This is the authoritative text on Samkhya. Sanskrit Text, word by word meaning, and commentary.
Nature, body, mind go to death, not we. We neither go nor come. The man Vivekananda is in nature, is born and dies; but the Self we see as Vivekananda is never born and never dies. It is the eternal and unchangeable Reality.
-Swami Vivekananda