These two 'bridges' are ways of connecting Inner and Outer realities and apparently the establishing of the Bridge of No Space precedes the availability of the Bridge of No Time.
I have not even begun to explore the multiple layers of information available regarding these two 'bridges' between inner and outer realities, but the Bridge of No Time enables power to flow between the two realities by living from zero point energy. I have experienced it as absolute stillness where all striving ceases and everything is quiet. Intention is but the slightest preference; not even a thought and all of the cosmos responds accordingly.
The Bridge of No Space is more like a perspective that comes from contemplating life as a river of transient shapes and events; realizing that solidity is an illusion and that all around us are fluid interactive energy fields.
The cultivating of these two connections between inner and outer realities is an extremely advanced state of mastery where all in the environment aligns to support the fulfillment of individual destiny. That which inspires the individual falls effortlessly into place and manifests as a life that unfolds with grace.