Essentially the 21 is the manifestation resulting from thoughts, emotions and actions emanating from the 20, or 2. At this point, the initiate must learn patience and cultivate trust in your inner-knowing.
We see this idea succinctly in the three, the sacred number of completion, albeit not the final conclusion. Three's represent the union of the thoughts and emotion that ultimately prompt action.
The symbolic meaning of the divine seven is the acquisition of self-knowledge which is learned throughout a cycle. The number 21 is 7 times the vibration of the initial understanding. If you are projecting good energy, you will be manifesting good experiences, and poor experiences if your energy is low-quality.
In the Bible, the 21 is associated with resurrection - death and rebirth. It is the end of one cycle and the beginning of a new mission. We see the same idea reflected in modern-day traditions. When a person turns 21, they are said to have reached maturity and in the UK are given “the key of the door.”
On the one hand, the father and mother archetypes can be very supportive of your personal development, but they can also be limiting. The programs installed in your unconscious are nearly always governed by the mother and father imagos.
In the Bible, we see the 21 as a reflection of both good and bad. It is associated with sin and rebellion but is also a representation of God and the Temple. There are 21 chapters in the book of Judges, a significant title given the 21 is when judgement is finally handed down.
Sin relates to your weaknesses. These do not have to be directly related to the 7 deadly sins, but they are often the root of emotional problems. That doesn't mean that you shouldn't commit the 7 deadly sins either - you need to have fun and treat yourself. The lesson here is don't indulge.
Rebellion is the next step. The conscious mind has to rebel against the programs of the ego and the super-ego which more often than not carry low-quality information installed by society. There is a misconception of the way we are supposed to be.
Life is a misconception because many of the thoughts you think throughout the day have been planted in your head by other people - not by yourself. Look within, understand your unconscious and upgrade your programs with inner-knowledge. Truth. The True Self.
But what if the idea is a lie?
There are three voices in your head; ego, supereg0 and The Self. It is only the Self where you will find the essence of your True Nature. So which voice are you going to listen to?
When the 21 appears repeatedly in a short space of time, observe what is happening in your life and question whether you are projecting good energy or bad energy.