Tao Te Ching 27

Good travelers walk the earth lightly.
Good speech is not critical.
Good accounting does not rely on calculation.
Good security does not depend on locks
   yet is impregnable.
Good bonds need no rope
   yet cannot be undone.

The wise realise that to abandon the weak is to diminish themselves:
   to assist in raising them is the enlightened path.

While the far-seeing person sets an example for the short-sighted,
   the myopic also exist to enable the far-sighted to develop acuity.
Intelligent folk who neither value their teachers nor the wisdom they offer spread confusion.
   This inexplicable behaviour.