He who meditates is not able to work. He who works is not able to meditate. This is not balance. This is not equanimity. The two principles, meditation and action, must be well-balanced. You must be able, if you are ready to follow the divine injunction, to take up whatever work you are given even a stupendous work and leave it the next day, with the same quietness with which you took it up and without feeling that the responsibility is yours. You must be able to work hard in the world with tremendous force and, when the work is over, you must be able to shut yourself up in a cave as an absolute recluse for a long time with great peace of mind. That is balance that is real strength. Then only you have gone beyond the qualities. ”He, O Pandava, who hateth not radiance (Sattva) nor outgoing energy (work), nor even sloth and slumber (Moha) when present, nor longeth after them when absent he is said to have crossed over the qualities” (Gita, XIV-22).
When you advance in the spiritual practice, it will be very difficult for you to do meditation and office work at the same time, because the mind will undergo double strain. Those who practice meditation will find that they are more sensitive than the people who do not meditate and, because of that, the strain on the physical body is enormous. The mind works in different grooves and channels with different Impressions during meditation. It finds it very difficult to adjust to different kinds of uncongenial activities. As soon as it comes down from the meditation, it gropes in darkness. It gets bewildered and puzzled. The Prana (energy) which moves inward in different grooves and channels and which is subtle during the meditation has to move in new, different channels during worldly activities. It becomes very gross during work. It has to work in different grooves and channels. When you again sit for meditation in the evening, you will have to struggle hard to wipe out the newly acquired Impression you have gathered during the course of the day and get calm and one-pointedness of mind. This struggle sometimes brings in headache.
It behoves, therefore, that advanced house hold Yogic students will have to stop all the worldly activities when they advance in meditation, if they desire to progress further. They themselves will be forced to give up all work, if they are really sincere. Work is a hindrance in meditation for advanced students. That is the reason why Lord Krishna says in the Gita, For a sage who is seeking Yoga, action is called the means; for the same sage who is enthroned in Yoga (state of Yogarudha), serenity (Sama) is called the means. Then, work and meditation become incompatible like acid and alkali or fire and water or light and darkness.
Mind – Its Mysteries and Control by Sri Swami Sivananda