himalayanspirit wrote:What is the theory of intelligence in Buddhism? It goes without saying that your intelligence is a result of various causes of the past. Can one be more intelligent through practice or become dumber through wrong practice?
Another point is about wisdom. Is it related to intelligence in Buddhism? Can someone be an Arhat and still lack wisdom? Or be an average intelligence guy and still gain wisdom through cultivation? How is wisdom and intelligence correlated to Buddhist concepts like Citta, Karma, Vijnana etc?
I am not familiar with a quote or a specific stance on intelligene in Buddhism, we can hope someone with more experience can quote something for us. However I will take a stab at the questions
I think it is wise to see that the goal of the Buddha was to remove suffering, and wisdom in this case is to understand the 4 noble truth, i.e. craving, its cause and its removal. So the type of wisdom or intelligence is "insight" and related to the working of our minds and the removal of craving, firstly.
What is good about this is that we already have all the resources we need e.g. mind, body, meditation time. A teacher etc. is important of course, but my point is that the wisdom/intelligence is based within this arena, it isn't, in my opinion, about IQ tests or ability to pass exams or memorise formulae. (I am not suggesting you saying it is, but to fine tune our answers).
So an arahat doesn't need to be able to read or write, or to know how to drive a car. It may also be possible that an arahat cannot teach or express his feelings into words, but her/his insight has lead to the end of suffering and that is the summum bonum of Buddha's teaching. With this knowledge and insight she will be able to overcome karma* through right actions etc. Citta and Vijnana are labels, in my opinion, which help us to arrive at the goal.
Just some answers on personal understanding, hope that they help
*There is some reason to understand that karma does not affect the arahat, they neither make it or reap its results as there is no 'self' and no doer of negative actions.