What is Mantra?

"Mananaat traayate iti mantraha"
The above sanskrit expression means, that which uplifts by continuous repetition is a Mantra.

Some Definitions of Mantra -

Mantra is a subtle sound vibration, which through repetition aims at expanding one's awareness or consciousness.
Mantra is a Sanskrit word. They are mystical formulas that may be recited or sung and are often repeated many times.
Mantra is a sound, syllable, word, or group of words that are considered capable of "creating transformation"

A saying from the ancient scripture state that, "Speech is the essence of humanity”. All of what human race reflects that the ultimate happens is determined by the expression of ideas and actions through speech and its derivative, writing. Everything comes into being through the power of words. All the ideas remain unactualized unless they are shaped through the power of speech.

Various sounds have diverse effects on human consciousness. If a soft sound of wind rustling through leaves soothes our nerves, the musical note of running stream captivates our heart; similarly thunders may cause fright and fear. The proper chanting of Sanskrit Mantras grants us with the power to accomplish our goals and elevate ourselves from the ordinary to the higher level of consciousness. Chanting of mantra bestows the power to heal; ward off evils; gain wealth; acquire supernatural powers; worship a deity for exalted communion and for attaining blissful state and attain liberation.

In Oriental Tradition, like Hinduisam, Buddhisam and Tantric practices mantra signifies as a prerequisite for spiritual growth and high attainment. Here are some important thoughts about mantra, which will facilitate you to begin a realistic understanding of what mantra is and what it can do.

Mantras are energy-based sounds. Saying any word generates a definite physical vibration. Over time, if we know what the effect of that vibration is, then the word may come to have meaning associated with the effect of saying that vibration or word. This is one level of energy basis for words. Another level is intent. Actual physical vibration when coupled with a mental intention, the vibration then contains an additional mental component, which influences the result of saying it. The intent when overlaid upon the waveform of the sound as the carrier wave. Although there is a general meaning, which comes to be associated with mantras, the only lasting definition is the result or effect of saying the mantra.  

It is significant to have absolute belief in the recitation of Mantras. Moreover it should be chanted under the expert guidance. It is primarily through faith - aided by strong will - that one achieves one's goals. A sound body and calm mind are essential for the chanter of Mantras. Once you are free from all worries and have achieved stability in mind and body, you will derive maximum benefit through the recitation of Mantras. You must have a definite object in view and a strong will power to obtain the desired objective, and then direct that will to achieve the goal.