BG 2.15-17
The man whom these torment not, O chief of men, balanced in pain and pleasure, steadfast, he is fitted for immortality. The unreal hath no being; the real never ceaseth to be; the truth about both hath been perceived by the seers of the essence of things. Know That to be indestructible by whom all this is pervaded. Nor can any work the destruction of that imperishable One.