inseparable quotes

Non-violence is not a garment to be put on and off at will. Its seat is in the heart, and it must be an inseparable part of our very being.

-[great soul]
  War or Peace,'Young India'.

   We have no other notion of cause and effect, but that of certain objects, which have been always conjoined together, and whichinall past instanceshavebeenfound inseparable.

- David Hume
  A  Treatise of Human Nature, bk.1, pt.3, section 6.