When you leave here, you should practice bringing everything back to your own mind. Look at your mind with this mindfulness and clear comprehension and develop this wisdom. With these three conditions there will arise a ''letting go''. You'll know the constant arising and passing away of all phenomena.
You should know that that which is arising and passing away is only the activity of mind. When something arises, it passes away and is followed by further arising and passing away. In the Way of Dhamma we call this arising and passing away ''birth and death''; and this is everything - this is all there is! When suffering has arisen, it passes away, and, when it has passed away, suffering arises again2. There's just suffering arising and passing away. When you see this much, you'll be able to know constantly this arising and passing away; and, when your knowing is constant, you'll see that this is really all there is. Everything is just birth and death. It's not as if there is anything which carries on. There's just this arising and passing away as it is - that's all.
This kind of seeing will give rise to a tranquil feeling of dispassion towards the world. Such a feeling arises when we see that actually there is nothing worth wanting; there is only arising and passing away, a being born followed by a dying. This is when the mind arrives at ''letting go'', letting everything go according to its own nature. Things arise and pass away in our mind, and we know. When happiness arises, we know; when dissatisfaction arises, we know. And this ''knowing happiness'' means that we don't identify with it as being ours. And likewise with dissatisfaction and unhappiness, we don't identify with them as being ours. When we no longer identify with and cling to happiness and suffering, we are simply left with the natural way of things.
So we say that mental activity is like the deadly poisonous cobra. If we don't interfere with a cobra, it simply goes its own way. Even though it may be extremely poisonous, we are not affected by it; we don't go near it or take hold of it, and it doesn't bite us. The cobra does what is natural for a cobra to do. That's the way it is. If you are clever you'll leave it alone. And so you let be that which is good. You also let be that which is not good - let it be according to its own nature. Let be your liking and your disliking, the same way as you don't interfere with the cobra.
So, one who is intelligent will have this kind of attitude towards the various moods that arise in the mind. When goodness arises, we let it be good, but we know also. We understand its nature. And, too, we let be the not-good, we let it be according to its nature. We don't take hold of it because we don't want anything. We don't want evil, neither do we want good. We want neither heaviness nor lightness, happiness nor suffering. When, in this way, our wanting is at an end, peace is firmly established.
And what is right speech? Abstaining from lying, from divisive speech, from abusive speech, & from idle chatter: This is called right speech.