This could be called the epitome phase. The enlightenment phase. The eureka phase. It depends on the magnitude of the problems you have been grappling with.
Let's get this out of the way: if you tell a psychiatrist how you are feeling then you will probably be branded manic and given drugs which stop the process. Your neurotransmitters will be cranked, you will feel expansive, you will have all the answers and incredible confidence. Maybe you'll feel so much love for the world that you lack ways to express it and go around telling people you're Jesus or the Buddha. It depends on what problem you have just solved.
If you solved a scientific problem then you will have a eureka moment. If you were working on an art project then it will be clarity and creativity and drive. If you were working on ending the suffering of your life - as many of us are - then you will feel like a messiah and will want to share your newfound delivery with everyone else in the species.
If you were in a church or a synagogue or a monastery you would have a religious leader to guide you through this. If you were in an art studio or a dance studio then you would have the encouragement to create your masterpiece. If you were in a laboratory or a library then you would be cranking out page after page of enlightened theses. If you were in a psychiatrists' office then you would be branded broken and given drugs to calm you down. Curate your environment.
Your neuroplasticity will remain *incredibly* high for a period after the initial explosive awakening. Think of it like this: you just tore down a rickety old hotel and dug up the foundations ready to build something new. The soil is freshly turned and furtile. Whatever you plant at this phase will go in deep. Very deep. You want positive seeds: seeds of non-greed and non-hatred. Greed and hate will just make you hunger and rage.
The reason some people are born again into a religion, or the reason they develop utter conviction in the teachings of their existing religion, is that they are programmed during this ultra-receptive phase. You can make of yourself a Buddha or a jihadi. You can run the numbers for what might happen if you are called psychotic.
The difference is that you are under control. You may be 'out of control' in terms of consensus-reality, but you are under control in terms of how you behave and how you manage this. You will be operating according to your own principles of what it important, and hopefully taking this opportunity to become the change you want to see in the world, since your external world is a mirror of your internal one.
The key difference between insight and pathology: you are heading in a positive direction. But that positive direction relies on you having cultivated a good scaffold and ethical baseline for living.
This is the time to write and create and dance and walk and celebrate.
Just remember that the change is within you, not the external world. Your world may look different - very different if you are going through a root-code level change like a realisation of non-self - but this is merely a reflection of your new perceptual framework. The rest of the world is still ticking along as it always did.
The intensity of this experience can range from a few days of increased artistic productivity to a few weeks of inhabiting your scaffold and being decoupled from the accepted view of reality.
My own experiences had me spending weeks as the final incarnation of the Buddha, with our entire simulated world and all members of the species residing inside my own body, which had synced with [ship]. At the same time I was taking my kids to school, cooking dinner and cleaning the house.
Remember: it will always pass. Do not cling to it. Do not try to extend it.
The altered states are merely because of the level of neuroplasticity induced when you intentionally changed your perceptual framework for the real-world. They will settle down with time.
Practicalities:
Avoid alcohol, caffeine and drugs
Walk and cook and eat and do other grounding activities
Write and export your ideas, but do not feel the need to publish them just yet (says the guy who made this)
Become the change you want to see
Resist the urge to try to convert people to your new worldview
Cultivate your media intake carefully
Cross-tradition parallels:
Buddhist: Corresponds to path-fruition and the review phase following major insight. The practitioner experiences immense clarity, pliancy, and a sense of liberation as perception reorganises.
Hindu / Advaita: The phase of samādhi or the first realisation of Ahaṃ Brahmāsmi (“I am Brahman”). Awareness seems all-pervasive, distinctions collapse, and confidence in non-duality arises before stabilisation into sahaja samādhi.
Christian mysticism: The stage of illumination, following purification and preceding union. It brings rapture, creative inspiration, and the desire to communicate divine truth.
Sufi: Fana fillah - ecstatic dissolution of the self in God. The seeker feels unified with the Absolute, radiant with love, often overflowing into poetry or teaching.
Daoist / Zen: Kenshō or satori - a sudden awakening where the nature of mind is seen directly. The world appears newly transparent and alive.
Jungian: Parallels the phase of ego-Self union or inflation. Transpersonal energy floods consciousness; the ego temporarily identifies with the Self, producing illumination, confidence, and visionary creativity. Properly contained, it marks the opening of individuation.