A word, a name of God, or a spiritual phrase that is repeated over and over again is known as a mantra.
The practice of mantra is an effective way to concentrate your mind. But as important as concentrating your mind is what you concentrate on. Although the mind can focus on anything, only certain words can qualify as a mantra. A mantra must connect you with the sacred. Most of them focus you on God through repetition of a divine name. A mantra provides a boat with which you can float through your thoughts unattached, entering subtler and subtler realms. It is a boat that steers itself – to the threshold of God.
The use of mantra sets up one thought, one wave, that repeats over and over again, dislodging your attachment to all other thoughts, until they are like birds gliding by… Offer all your thoughts as a sacrifice to the mantra. If you think, “This isn’t going to work,” take that thought and imagine yourself offering it to the mantra on a golden tray with a silk handkerchief, incense and a candle. Offer it as you continue to repeat the mantra undisturbed. Keep offering your thoughts, your doubts, discomforts, boredom, even your sore throat.