The experience of transcendence occurs within the nature of things -- our nature. A small mustard-seed grows into a tree big enough for birds to come and roost in its branches. To try to make it grow faster or slower would be absurd and counterproductive. It is the same when we experience the growth of Divine Love in our hearts as we let the husk of the ego drop away and like seed we die to self that we may fulfill the destiny that is our true meaning, that the potential of life within us may come to fruition.
Breathing is the connection between the mind and the body. When the mind concentrates on the breath, it focuses attention on the present moment. Breathing is the first step on the path to discover your spiritual nature. As you get the body to breathe correctly, the mind settles down, and that creates fertile ground to develop whatever spiritual nature exists within you.