In plain words
This is tat tvam. Tat means that. Tvam means this. This is what is near. That is what is far. Far means beyond the senses. What is within the reach of the senses is this, what is near. What is within the reach of the senses is this world. What is beyond the senses is the principle of the Ātma. When we want to attain such a principle of the Ātma, these senses must turn to a level beyond them. That, they said, is dhyāna.
Dhyāna does not mean concentration. Concentration is joined with the senses. We are seeing. What sees is the eyes. We are hearing. What hears is the ears. We are reading a book. We are holding this book in our hand. We are seeing the letters with our eyes. We are inquiring with the mind. We are weighing it with the intellect. Only then are we able to read the book. So these eyes, this mind, this intellect, these hands: all these are senses. Because it is joined with the senses, this is below senses. That is why it is concentration. Only when you go to the level beyond the senses does it become meditation. But to reach that level of meditation, we must cross a border in the middle, from this level of concentration. This is concentration. That is meditation. In the middle there is a border. That is contemplation. Only after we cross this contemplation does meditation start for us. Today a great many people, saying “Meditation, meditation,” a great many people are wasting time. Are they able to hold the mind still even for a single moment! No. They sit half an hour, an hour. Instead of wasting time in this way, do service to society. You will be so much happier. You sat for an hour. Were you able to hold your mind still even for a single moment? This mind keeps running about as if it had gone mad. Pulling back this running mind, and again it runs. Why are you wasting time in such useless activity? Duty is God. Do service with the feeling, “All the work I do is service of God.” work will be transformed into worship. Regard all the work you do as God's work. This becomes true meditation; merely sitting without moving, with the eyes closed, will never be meditation. Only for a photograph do they look right. It is through taking up such meditation that all the young people of today are wasting the very nature of the mind. Whatever work you do is God's work. Think of it in this way. My body itself is a tool. Develop the faith that through this tool God Himself is doing this work. This sādhana will be of great help. It will be an example. This “meditation, meditation” is bound up with selfishness. Satisfaction for oneself alone. It does not inquire at all how much all the others suffer because of oneself.