“Miscellaneous talking is a very bad habit. It distracts the mind. It keeps the mind always Bahirmukha (outgoing) and makes a man unspiritual. A vow of silence must be practised once a week. Much energy is wasted in talking.
The Vag-Indriya (organ of speech) seriously distracts the mind. “Speech is the fourth ‘foot’ of Mind-Brahman, because it is by means of the ‘foot’ of speech that the mind approaches the denotable objects such as cow, goat, etc. Therefore speech is like a foot of mind. In the same manner, nose is a ‘foot’, because it is through nose that the mind approaches objects of smell. Similarly, the eye is a ‘foot’; the ear is another ‘foot’. This constitutes the four-footed character of the Mind-Brahman” (Chhandogya Upanishad).
Do not allow anything to come out from the mind through the Vag-Indriyas (organ of speech). Observe Mouna (a vow of silence). This will help you. Considerable peace follows Mouna. The speech energy becomes transmuted into spiritual energy (Ojas). Sankalpas become much decreased. Will becomes stronger. Now you have shut out a big source of disturbance. You will rest now in peace. Meditate on God or Brahman now in right earnest.
Spiritual aspirants must observe Mouna for some hours daily.
Be careful in the selection of your words before you speak. Think thrice before you speak. Consider what effect the words will produce on the feeling of others. Observe Mouna for a couple of years. It is Tapas of speech.
Do not argue unnecessarily. Argument brings about hostility, heated feelings and wastage of energy. Every man has got his own views, his own opinion, ideas, sentiments, beliefs and convictions. It is very difficult to change the views of others. Do not try to convince others. When you are an aspirant, when you are gathering facts and knowledge from the study of sacred lore, do not argue with others till your thoughts have become mature and steady.
Imagination in the mind always exaggerates. Exaggeration is a modification of lie. Aspirants should not exaggerate. They should utter words with mathematical and scientific precision.”