When we start out on a spiritual path we often have ideals we think we're supposed to live up to. We feel we're supposed to be better than we are in some way. But with this practice you take yourself completely as you are. Then ironically, taking in pain - breathing it in for yourself and all others in the same boat as you are - heightens your awareness of exactly where you're stuck.
"It is important to have an idea of the path one wants to be on. This statement comes with an important caveat that one not be too attached to the outcome. To have a concept about the nature of one's life path can be a skillful tool in living one's life. However there is a danger that one will misconstrue a goal to be the entire purpose of one's life and (in so doing) perhaps create a negative driving force."
"One usually finds a Deity or god, which can help liberate, teach them. It is not helpful, however, to have a Deity forced upon one. It may be the wrong angel-the wrong guide. In such a case, the guide or religion can have the effect of having the individual not perceive anything spiritual or cause them to believe they've failed. Unfortunately, sometimes in these instances, individuals will shun their own spiritual path."
Source: The Living Word of Kuan Yin: The Teachings & Prophecies of The Goddess of Compassion & Mercy
The experience of fragmented mental conditions or inner environments naturally leads aspirants to desire wholeness and completeness, and the spiritual path which suggested these qualities must contain teachings or presentations explainable in experiential terms. Long ago, the Buddha recognized that it is not the world which requires understanding but our own nature. There are no mysteries except those of an unclear mind.
The Tantric way is open to all the richness of human nature, which it accepts without a single restriction. It is probably the only spiritual path that excludes nothing and no one, and, in this way, it corresponds to the deep aspirations of men and women today.
Source: Tantric Quest: An Encounter with Absolute Love, Pages: 22