When the well-traveled one, in teaching, uses conceptions
and ideas, people should remember the unreality of all such
concepts and ideas. They should recall that the well-traveled
one, in teaching spiritual truths, always uses such notions in
the way that a raft is used to cross a river. The raft is of no
more use when the river has been crossed, and should be
discarded. So these arbitrary conceptions of and about spiritual
things should be given us as one attains enlightenment. How much
more should one give up conceptions of non-existent things?"