Nearly all different cultures believe in non physical dimension of existence what is opposite to physical. In many instances they think that those two dimensions have subtle interaction in which is non physical superior to physical.
People have deep-rooted idea about existence of consciousness without body under names of angels, spirit, fairy, nymph etc. That idea is not religiously based. Many non religious people have intuitive idea about it. Some people start to have that idea after death of close friends or relatives, some after NDE etc.
Questions are:
Why so many people with different backgrounds, cultures, religious believe have that idea? Where is that idea come from?
How wise is dismiss that idea without been able to prove it impossible?
How we can be so sure that all this what we notice and call physical existence dosn't give appearance of only possible existence, and that is not part of something more complex?
We can be in illusion that discovering physical we discover the whole what it is and not a part. Therefore our knowledge can't be without contradiction.
Argument of people who categorically denial any existence except physical is that all what they can see, notice or discover is this physical existence. But, that is something what we can expect because we are amid physical existence . As man goes under the water all what he can see and notice is the water or all his experiences must be trough water; and that dosn't mean that space without water dosn't exist.
In physical existence we can't see consciousness without body or matter because we conclude that matter and consciousness is the same and that one without other can't exist. That is based only on appearance and not on essence because we still don't understand, not only matter, but more impotently consciousness.

Human knowledge represent constant change or process. Process is something what is not complete or finite but always have phase, continuity and development. Therefore human knowledge can't be whole and perfect but always partial and limited.
Illusion of perfect and finite knowledge are characteristic of arrogance. Arrogance by itself prevent progress in knowledge. Only when are people aware of own limitation they are capable to be open to different ideas or learn and make progress. On that way they also can free them selves of own illusion and prejudices, but in the same time to know that they can form other illusions and prejudices caused by partiality of knowledge.
Proportion of that what we know with that what we don't know about existence is immense to give us right to be confident. Approach to question of existence must have to be flexible or open to consider different and even contradict alternative and thinking.

Different people have different idea of enjoyment. Those differences are caused by different emotional or spiritual growth of people. More people know them selves - more they understand them essential needs. Those needs always have constructive nature with everything outside them selves and they equally nourish body and soul. Destructive pleasure and enjoyment are always result of prevented emotional or spiritual growth.
Although it seems that those enjoyment are limited and not numerous, that is not so. They are unlimited and inexhaustible. Spiritually or emotionally mature man dosn't limit his pleasure only on spectacular and sensational events outside, but find pleasure in his own progressive spiritual growth that enables him to discover deeper meaning and beauty.
That man finds pleasure in whole existence. For him is enough to watch bird in flight, hear the murmur of brook, breath freshness of the air and feel immense joy, happiness and pleasure. On that way his enjoyments are never uniform but always fresh and new.

Although I still learning English and therefore my expression is limited, my mind and love of wisdom is not. Since I know for myself I wanted to know what is existence, and what is this all about? That cause me to read a lot and to think.
Knowledge is process as existence. All what we can know directly in this existence are ourselves. Trough us we experience everything around us. More we understand ourselves - more we understand everything around us.
We are the window trough we watch everything what surrounding us. If is our window narrow and fogged our view will be also narrow and fogged and vice verse. Broader the window - broader the view. Because everyone of us have different level of self development, everyone of us have different perception. Or, every man looking trough his own window has unique view.
I invite all people who have similar affinity to share them thoughts about life and existance.
For start: What is non existence? We agree that all what exist is existence. We can't say that non existence exist, because it must be existence then. If we say that non existence dosn't exist, again exist only existance.
Consciousness is essence of life and existance, as Rene Descartes says: "Cogito ergo sum."