To observe and watch one's own mind is something really interesting. The untrained mind will run and follow its old habit patterns. Because it has not been trained and taught, it will get lost in all kinds of stories and issues. Therefore we have to train our mind. The meditation practice in Buddhism is all about training one's own mind.
I am like a tree in a forest. Birds come to the tree, they sit on its branches and eat its fruits. To the birds, the fruit may be sweet or sour or whatever. The birds say sweet or they say sour, but from the tree's point of view, this is just the chattering of birds.
Know and watch your heart. It's pure but emotions come to colour it. So let your mind be like a tightly woven net to catch emotions and feelings that come, and investigate them before you react.
Try to be mindful, and let things take their natural course. Then your mind will become still in any surroundings, like a clear forest pool. All kinds of wonderful, rare animals will come to drink at the pool, and you will clearly see the nature of all things. You will see many strange and wonderful things come and go, but you will be still. This is the happiness of the Buddha.
People go through life blindly, ignoring death like revellers at a party feasting on fine foods. They ignore that later they will have to go to the toilet, so they do not bother to find out where there is one. When nature finally calls, they have no idea where to go and are in a mess.
With even a little intuitive wisdom we will be able to see clearly the ways of the world. We will come to understand that everything in the world is our teacher.
The forest is peaceful, why aren’t you? You hold on to things causing your confusion. Let nature teach you. Hear the bird’s song then let go. If you know nature, you’ll know truth. If you know truth, you’ll know nature.
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.
Do not try to become anything. Do not make yourself into anything. Do not be a meditator. Do not become enlightened. When you sit, let it be. What you walk, let it be. Grasp at nothing. Resist nothing.
You say that you are too busy to meditate. Do you have time to breathe? Meditation is your breath. Why do you have time to breathe but not to meditate? Breathing is something vital to peoples lives. If you see that Dhamma practice is vital to your life, then you will feel that breathing and practising the Dhamma are equally important.
In practice, some come to see easily, some with difficulty. But whatever the case, never mind. Difficult or easy, the Buddha said not to be heedless. Just that--don't be heedless. Why? Because life is not certain. Wherever we start to think that things are certain, uncertainty is lurking right there. Heedlessness is just holding things as certain. It is grasping at certainty where there is no certainty and looking for truth in things that are not true. Be careful! They are likely to bite you sometime in the future!
Do not be a bodhisattva, do not be an arahant, do not be anything at all. If you are a bodhisattva, you will suffer, if you are an arahant, you will suffer, if you are anything at all, you will suffer.
Just know what is happening in your mind - not happy or sad about it, not attached. If you suffer see it, know it, and be empty. It's like a letter - you have to open it before you can know what's in it.