Paramahansa Yoganda founded Self-Realization Fellowship in 1920 to disseminate his teachings worldwide. In his book, How You Can Talk with God, he writes that our physical form is made of molecules, molecules are made of atoms, atoms are made of electrons, and electrons are made of life force or "lifetrons"--countless billions of specks of energy. With your spiritual eye, you can see the body as a mass of scintillating specks of light--the energy that is emanating from your 27 thousand billion cells. He goes on to say that "only through delusion do you see the body as solid flesh. In reality, it is not matter but energy."
In the Autobiography of a Yogi, I was amazed to learn that weeks after Paramanhansa's death, his unchanged face shone with the divine luster of incorruptibility. The Los Angeles Mortuary Director, Forest Lawn Memorial-Park wrote to Self Realization Fellowship a notarized letter with these excerpts. "The absence of any visual signs of decay in the dead body of Paramanhansa Yogananda offers the most extraordinary case in our experience...No physical disintegration was visible in his body even 20 days after death. This state of perfect preservation of a body is, so far as we know from mortuary annals, an unparalleled one..."
This great world teacher was demonstrating the value of yoga (scientific techniques for God-realization) even in death.
If you haven't read Autobiography of a Yogi, it's a fascinating story of an extraordinary search for Truth.