Accumulated knowledge and self-realized knowledge...

It doesn't matter how many books we have read about yoga and meditation, accumulating lots of information about this and that, from here and there,

We can use those information to talk to other people about yoga and meditation,

Or to teach yoga and meditation classes to others,

And we might feel good and proud about ourselves can teach a relatively good yoga and meditation class based on the information that we acquired from the books, or heard from other people,

But then ourselves are not free from worldly self-image or identifications with different qualities of names and forms,

We attach and rely onto other people's reactions and feedback towards ourselves and our actions or performances, to feel good, happy, meaningful and confident, or not.

We are determined by the impermanent conditions and abilities of the physical body to be who we are,

We are determined by the efficiency of the function of our sense organs and the senses to be who we are,

We are determined by the accumulated knowledge or information to be who we are,

We are determined by a particular (or multiple) specie, gender, culture, race, nationality, belief, religion, points of view, personality, behavior, family ties, personal relationships, interests, talents, skills, sexual orientation, social lifestyle, way of life, living environment and condition, possessions, what we do and don't do, what we have and don't have, acknowledgements, individual or group achievements, worldly or spiritual achievements and contributions to be who we are,

We are not free from dissatisfaction, disappointment, frustration, irritation, greed, anger, hatred, jealousy, animosity, regrets, guilt, feelings of hurts, fear and worry,

We perceive ourselves as victims of suffering, impermanence, crisis, unjust, discrimination, prejudice, racism, betrayal, fraud, lies, misunderstanding, or ill-treatment,

We still have many worldly desires need to be fulfilled, there are many worldly or spiritual activities we need to accomplish, to feel meaningful and confident about ourselves and life existence,

And we are disturbed and determined by whatever the mind perceives through the senses, and haven't realize unconditional love and peace, to be in harmony within oneself and with other beings or the environment,

We expect other beings and the environment that we don't like or disagree with will change into something that what we think and believe as the way it should be or the way that we like it to be,

As we are still very much being over-powered by the egoism, the worldly self-image and self-esteem, the actions and the fruit of actions, the conditioned and limited thinking and beliefs, the feelings and emotions, the desires, the likes and dislikes, the agreements and disagreements, the craving and aversion coming from the impure egoistic mind,

As we haven't realized the knowledge of the Self, about non-duality, non-separateness, attributelessness, namelessness and formlessness through our own self-realization,

It means we still need to work on disciplining ourselves, purifying and restraining the mind.

Keep practice.