The person who is trying to concentrate can be distracted. He can be easily distracted by anything. Just a dog in the neighborhood starts barking and he is distracted, a child starts giggling and he is distracted, a bird starts singing and he is distracted. Anything will do, as if he is just waiting for anything to distract him; he is tired of focusing his mind. It is a tension, it is a strain. Meditation is not a tension, it is not a strain. One is never tired of meditation. It is relaxation — how you can be tired of it? It is deep rest, it is utter restfulness. One is available to everything; nothing can distract you.