The practice of thinking
What is thought?
Any thought is an image or meme generated out of memory through the biological and chemical process of thinking activity in the brain. The basis of thought is consciousness and the manipulation of consciousness, but thought is an individual meme which is reflective of memory and recreated in the mind as a reflection of memory which goes towards the development of an idea or concept. Thinking is a process which is related directly to conception, and thought is the outcome of thinking or conception because thought requires the activity of thinking to come into being. Therefore thought is any meme or fragment of an idea or concept which comes into being as a result of thinking and conception.
What is meant by meme here is the smallest possible fragment of thought, which is an image or symbol which can go together with other memes or images to create language or culture through which one can comprehend or verbalize the thought. This is no different in nature from the energy particle, which can be perceived either as a particle or an energy wave. To create a simple example let's say you hear or want to say a simple world 'hello'. To be able to understand what hello means or to be able to say hello, you have to understand each of the five individual letters which make up the world hello, how they relate to each other, and what their significance is in the word. You understand the significance of the letter 'e' in the word 'hello'. You also understand and know how the letter 'e' sounds and is pronounced in the word 'hello'. Consider that the significance of the letter 'e' in the word 'hello' is a single thought, and awareness of how the letter 'e' is to sound when pronounced in the word 'hello' is another thought.
In the above example you can see how thought is a meme or a fragment of an idea or concept produced out of memory. The understanding of the letter 'e' and how it should sound is not a complete idea or concept but is part of your concept of the word 'hello'. Thought can only come out of memory because either you have just heard the word 'hello' being spoken through your perception and to be able to comprehend the word 'hello' you have to recreate it out of your memory. At the precise moment in time when someone greets you with hello you are not thinking about the word hello, you are perceiving it as a sound through your ears. Likewise if you are using the world 'hello' to greet someone else you can only do this by verbalizing an aspect of language which you understand. Inevitably the word 'hello' which you say to someone else can only be created out of memory.