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.

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