Right here and now, nothing is needed. Nothing can be added, nothing can be lost. You ARE. You KNOW you are. YOU are self-evident. Yet WHAT you are is confused, taken to be the body, taken to be the "thinking process".
You KNOW you are because of what? Your existence cannot be denied. Why? Why is it that YOU cannot be denied? What is it about right HERE and NOW that makes YOU self-evident?
Is it the body? Does the appearance of body make you self-evident? Are you certain of your existence because of the presence of a body? No. That body is in constant change. It disappears and reappears. It's function is according to the genetics, the environment... Life is functioning that body.
What about the thinking process? This is a bit more difficult because identification with the mind is the strongest identification. Yet the solution is extremely simple. You are AWARE OF thoughts. You know thoughts. They come and go - and your existence cannot be dependent on something that is SO changeful. Your existence doesn't disappear when thoughts are paused. So thoughts are spontaneously appearing and disappearing. Yet the content of thought is strongly identified with, so much so that it is said "I AM THINKING".
Are you? Are you thinking, or simply aware of thoughts? Your true existence does not depend on thoughts. Thoughts depend on your aware presence to be known. Yes?
So what ARE you? You are CERTAIN of your existence, yet what-you-are cannot be found, via the normal way of looking, looking for a "thing", looking for another concept. The body and thoughts are dependent - only there because you are there first, to know the coming and going of thoughts and body. Yet YOU are not dependent - you are SELF-EVIDENT. Evident without proof, evident without dependence on something else. Even when the "waking state" was gone, you KNOW you existed.
So what-you-are must be something else, something evident yet not appearing. Something evident yet not dependent. Something present here and now, yet not findable as some "thing".
What-you-are MUST be obvious, already, not in need of finding, not in need of a spiritual search. What-you-are MUST be fully known already, only overlooked BECAUSE it's SO obvious, SO simple.
When we look for our true Self, we are forever looking for some "thing", in the form of objects, feelings, sensations, perceptions, ideas, concepts, more beliefs... Yet when we recognize that we MUST be looking FROM our true Self already, that what-you-are MUST be THAT which is looking, then the confusion vanishes, as does the search.
Can you SEE the SEEING? No. You can only BE the seeing. Being/Knowing.