Salvakalpa samadhi is absorption in eternity to the point where there is no real concept of self but there's still a karmic chain. Nirvikalpa samadhi is absorption in nirvana; concepts of self and no-self go away completely.
Frederick LenzThere are seven primary centers, junctions, within the subtle physical body. These are called the seven chakras.
Frederick LenzYou're going to go to stillness. When that happens, the world collapses. There is no time, no space, no viewer, no viewing, no object in view.
Frederick Lenz