There are many mirages in spiritual path, which can not be attained never, regardless of our Herculean efforts and practices. Because those mirages are non-existing.
First, be aware, what not to expect from a spiritual practice, second be aware of what to expect from a spiritual practice. Third be aware of your physical, mental, genetic limitations to undergo an experience.
Whatever practice(kriya, yoga, meditation, watching breath, etc) you do, you experience upto what is provisioned in your gene by birth. You can not experience beyond that.
Some people under serious Transcendence state of conscious and some people can not. Experience is subjective from person to person by their respective genetic pattern by birth.
Not everyone undergo same experience by doing same practice, due to what is gifted in gene by birth.
Somebody’s destination is mirage to others.
You can overcome this limitation, if you know how to rewrite you genes.
You can overcome your biological limitations by altering your genes by continuous practice and perseverance.
There are other mirages due to cognitive errors.
Assuming or delusioning the output Or experience of yogic practice into a super state or super natural or something else rather how it is supposed to be understood. This can be corrected by getting into the right understanding properly.
For example, expecting a yogic practice will give you super powers or convert you into an extraordinary being, or cure your diseases, or change your mind, or resolve your problems, or make something happening, or give you super conscious, or transform you into something else, or give you unconditional ecstasy, or make you intelligent, or make you better being, or will make you smarter than how you are now and many more and what not.. These are cognitive errors or mirages of spiritual practices.
Expecting a spiritual practice will change you into something else or something unexplainable will happen or your mind will change, or etc is a serious obstacle in spiritual path.
You will give up your practice out of disappointment, because you are not able to reach mirages or attain mirages.
You will have smooth sail in your spiritual path if you understand and avoid mirages both genetic and cognitive.
Mostly, people give up their spiritual practice due to mirages of cognitive errors and impractical expectations.