What does it mean that when there is insight, calm can come? One way of understanding this in relation to developing insight is that you can allow any thought to arise, any emotion to arise, any sensations to arise; and whatever arises, you just observe, you just watch, you just know. So from that practice sometimes calm can come naturally without your wanting to have calm and tranquility. And sometimes if calm is not there and you are unable to really develop insight in that way, then you can focus your attention on the breath and try to develop some calm and clarity and again start investigating and developing insight.
And in relation to insight, according to the Buddha’s teachings there are three characteristics, three important aspects which we have to develop if we are cultivating insight. The first is to develop the understanding, to realize, how things are impermanent, how things are changing from moment to moment. So while we are sitting now, your thoughts are changing from moment to moment; there is one thought, then another thought arises. So there is this continuous change taking place in relation to your thoughts. Sensations in your body are also changing from moment to moment. Your state of mind too is changing from moment to moment; sometimes you may feel happy, sometimes you might feel restless, sometimes you may feel calm. So whatever your state of mind, that is also changing.
It is a very important step to be open to the changes that you are experiencing internally, and then whatever changes take place in your mind and body, if you learn not to resist them and if you learn to be open to them and realize what is happening, there can be any changes taking place but there will be no suffering.
In the same way, externally, the world out there, the life out there is also always changing from moment to moment; sometimes good things happen to us, sometimes bad things happen to us, sometimes unexpected things happen to us. But here again, whatever is happening externally, if you can realize the fact of change, of impermanence, and be open to it, any changes can take place but you can still be free because you recognize that we have no control.