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.
When we sit in meditation and hear a sound, we think, 'Oh, that sound's bothering me.' If we see it like this, we suffer. But if we investigate a little deeper, we see that the sound is simply sound. If we understand like this, then there's nothing more to it. We leave it be. The sound is just sound, why should you go and grab it? You see that actually it was you who went out and disturbed the sound.
All human beings have an innate desire to overcome suffering, to find happiness. Training the mind to think differently, through meditation, is one important way to avoid suffering and be happy.
Walk, but make walking a meditation; walk knowingly Breathe, but let your breathing become a constant meditation; breathe knowingly. The breath going in: watch it. The breath going out: watch it. Eat, but eat with full awareness. Take a bite, chew it, but go on watching. Let the watcher be there in every moment, whatsoever you are doing.
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.