If you are a meditator, as your meditation goes on becoming more and more luminous, your intelligence will be growing to the last breath of your life. Not only that, even after the last breath your intelligence will continue to grow - because you are not going to die, only your body will be dying. And the body has nothing to do with intelligence, mind has nothing to do with intelligence. Intelligence is the quality of your awareness - more aware, more intelligent. And if you are totally aware, you are as intelligent as this whole existence is.
Regarding this Dhamma, it is not something that we can simply talk about or take another's word for it. We need to develop meditation so that the understanding arises clearly within oneself. It is not the case that merely by listening to another's explanation our defilements will disappear. When we gain some understanding we need to chew on it again so that we see it for ourselves with certainty: paccattam.
Happiness, whether consisting in pleasure or virtue, or both, is more often found with those who are highly cultivated in their minds and in their character, and have only a moderate share of external goods, than among those who possess external goods to a useless extent but are deficient in higher qualities.
Silence and stillness are not states and therefore cannot be produced or created. Silence is the non-state in which all states arise and subside. Silence, stillness and awareness are not states and can never be perceived in their totality as objects. Silence is itself the eternal witness without form or attributes. As you rest more profoundly as the witness, all objects take on their natural functionality, and awareness becomes free of the mind's compulsive contractions and identifications. It returns to its natural non-state of Presence.
In awareness there is no becoming, there is no end to be gained. There is silent observation without choice and condemnation, from which there comes understanding.
Meditation, you know, comes by a process imagination. You go through all these processes purification of the elements - making the one melt the other, that into the next higher, that into mind, that into spirit, and then you are spirit.
Meditation is like a single log of wood. Insight and investigation are one end of the log; calm and concentration are the other end. If you lift up the whole log, both sides come up at once. Which is concentration and which is insight? Just this mind.
Happiness happens when you fit with your life, when you fit so harmoniously that whatsoever you are doing is your joy. Then suddenly you will come to know: meditation follows you. If you love the work that you are doing, if you love the way you are living, then you are meditative.
Meditation is not something restricted to times of formal seated meditation; it is most fundamentally an attitude of being-a resting in and as being. Once you get the feel of it, you will be able to tune into it more and more often during your daily life. Eventually, in the state of liberation, meditation will simply become your natural condition.