Lock is the symbol of logic (rational) seeking mind which does not want to
believe in miracles and prophecies. While Niobe is the symbol of experiential
knowledge and Morpheus the symbol of wisdom. We start our life as a innocent kid
following wisdom and when we grow we go after logic and rational thinking. Then
after sufferings and setbacks and intermittent success in life, in a certain
period of life we begin to understand that there something much more than we can
get by just rational thinking. This is when we start to appreciate again wisdom
and we take the side of it. This is the symbolism of the love triangle of
Niobe , lock and Morpheus.
This is also the reason why Niobe gives her ship to support Neo, not
because of the "belief" he is the "One" , but because of her experiencial
knowledge with being with Neo who can complete a task successfully.