Swami Ramakrishnananda's brother disciples wrote a hymn, Vivekananda Panchakam. In the first verse, he describes who the essence of Vivekananda is. He calls him Vivecke, the one who practices and embodies Vivekha. But what does this Vivekha mean? Anitya Drishshu, vivityanitam. Here is the heart of Advaita Vedanta. Seeing after seeing is coming before you and disappearing. Our bodies are continuously changing from birds to babyhood to childhood,. teenage in youth and middle age and old age. We're all getting there to becoming old and decrepit.