You may be engaged in the most active action, for example, in playing basketball, which needs a great deal of movement, and yet not lose the attitude of inner meditation and concentration upon the Divine. And when you get that, you will see that all you do changes its quality; not only will you do it better, but you will do it with an altogether unexpected strength, and at the same time keep your consciousness so high and so pure that nothing will be able to touch you any longer. And note that this can go so far that even if an accident occurs, it will not hurt you. Naturally, this is a peak, but it is a peak to which one can aspire.
  Do not fall into the very common error of believing that you must sit in an absolutely quiet corner where nobody passes by, where you are in a classical position and altogether immobile, in order to be able to meditate -it is not true. What is needed is to succeed in meditating under all circumstances, and I call "medi- tating" not emptying your head but concentrating yourself in a contemplation of the Divine; and if you keep this contemplation within you, all that you do will change its quality -not its appearance, for apparently it will be the same thing, but its quality. And life will change its quality, and you, you will feel a little different from what you were, with a peace, a certitude, an inner calm, an unchanging force, something which never gives way.