This is wrong information. Loving "thyself" means we need to love ourselves and to love others just like that---with care and Godly concern for others' well-being.Loving your own self is what satan tries to trick us into doing.
We are to love our neighbours as we love God. Love THYSELF. Not ourselves. Thy meaning God. Maybe try reading the KJV to understand the difference between thy, thine and ye and yours. Some other translations are iffy and just use 'you' for everything.
The holy spirit is in us, therefore we look after his temple, our bodies. Is that what you mean? So feed and nourish it.He owns us, so our body is not our own anymore. It is His dwelling place.
It's when one adheres only to archaic language that we do not speak in this day and age that errors get passed on.