Dimensional Leaping

In cosmos there are many ‘doors’ (‘points of dimensional transition’) and the process whereby access from one dimension to another is prevented might be called ‘dimensional sealing’.

All of evolution can be seen as a series of successive passages through doors or portals, each admitting to a dimension of greater intensity (and hence, of more rapid vibratory frequency) than the one preceding.
Even in our progress (as monads) through the mineral, vegetable and animal kingdoms, every graduated ‘step’ is to be considered a “door”— an emanation or ‘raying forth’ of the monad, while the monadic ray, per se, is different and is the coloring of the emanation.

A “door or initiation” acts as an inhibition to passage from one area of divine expression to another.

Ever in the process of human evolution which succeeds upon experience in the lower three kingdoms, the passage through many preliminary “doors” is also largely unconscious.

During the later phases, when the human being becomes more intelligent, there is a more focussed understanding of the moments of progress and passage.

So door may be closed, ajar, or open. The closed door prevents passage; the door ajar (partly opened) invites passage or promises full passage at a later time, and the open door allows passage.
The Door of the Third Initiation, signifies that one is emerging out of ‘childhood’ in the fifth kingdom of nature and is becoming an adult—though not yet full-grown.

Whenever a “door” stands truly “behind”, the members of the group may take their stand upon the accomplishments of the vibratory level to which they have been admitted.

When once a door is passed, it is rare indeed for the individuals or the group who have passed through that door to revert permanently to the vibratory level left behind. To do so would be a ‘devolution’.

This type of degeneration may gradually happen to those who deliberately choose the left-hand path; qualities associated with the animal kingdom may even begin to reappear.

That the door is left behind indicates a condition of relative freedom.
To understand the nature of the doors through which we have passed, one needs to assess the virtuous qualities which are firmly established within our nature, and, hence, built into our causal body.
Before every door there occurs a crisis, as one divests himself or herself of those vibratory tendencies which are not harmonious with conditions on the further side of the door.

Then, a point of tension is realized and sustained.
To sustain the requisite point of tension is to prove oneself initiate before one is, technically speaking, initiated.

Initiation, itself, is the passage through the door, and signifies emergence. Initiation is always a beginning and an end.

Source:
http://www.makara.us/04mdr/02comment/28rules/rule_1di_3.htm