\input lua-visual-debug.sty \hsize 3in \vsize 3in \centerline{A centered line with \TeX} \vskip .5in A wonderful serenity has taken possession of my entire soul, like these sweet mornings of spring which I enjoy with my whole heart. I am alone, and feel the charm of existence in this spot, which was created for the bliss of souls like mine. I am so happy, my dear friend, so absorbed in the exquisite sense of mere tranquil existence, that I neglect my talents. $$\int_e^x=mc^2$$ \bye