My body will not be a tomb for other creatures. - Leonardo da Vinci

The line has in itself neither matter nor substance and may rather be called an imaginary idea than a real object; and this being its nature it occupies no space. Therefore an infinite number of lines may be conceived of as intersecting each other at a point, which has no dimensions and is only of the thickness (if thickness it may be called) of one single line.

A wave is never found alone, but is mingled with the other waves.

Be not false about the past.