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Classical Sanskrit literature differs from Vedic literature, as it is not highly regulated by the उच्चारणम् ॥ uccharanam (utterance). Hence शिक्षा ॥ '''Siksha''' is of vital importance as an ancillary for vedas, because अशुध्दोच्चारणम् ॥ ashuddhoccharanam (wrongly uttered) mantras bring about a meaning change which can cause great harm to the यजमणि || yajamani (the performer of the yagna).               

Classical Sanskrit literature differs from Vedic literature, as it is not highly regulated by the उच्चारणम् ॥ uccharanam (utterance). Hence शिक्षा ॥ '''Siksha''' is of vital importance as an ancillary for vedas, because अशुध्दोच्चारणम् ॥ ashuddhoccharanam (wrongly uttered) mantras bring about a meaning change which can cause great harm to the यजमणि || yajamani (the performer of the yagna).               

An example of such wrong utterance :            <blockquote>''मन्त्रो हीनः स्वरतो वर्णतो वा मिथ्या प्रयुक्तो न तमर्थमाह ।''</blockquote><blockquote>''स वाग्वज्रो यजमानं हिनस्ति यथेन्द्रशत्रुः स्वरतोपराधात् ॥''</blockquote>If a mantra is devoid of a वर्ण || varna or letter, or has wrongly utterances or स्वर || swaras, then it does not the give the meaning it is intended to and produces a false meaning. This incorrectly and improperly uttered mantra becomes a वाक्वज्र || vakvajra (word weapon) and is capable of destroying the यजमणि || yajamani (performer of the yagna). Example is the famous story of Indra's Enemy, Vrittrasura whose origin was due to स्वरापराध ॥ swarapradha (wrong swara utterance) of a mantra.            <blockquote>'''''वृत्रासुर  जन्मं  || Vrittrasura Janamam''''' '':  त्वष्टा॥ Tvastha angered by Indra's killing of his son विश्वरूप  || Vishwaroopa, initiates an आभिचारिकं यागं  || aabhaicharikam yagam (a yagam performed to cause harm to an intended person) to procure a son to kill Indra. The ऋत्विज  || ritvijas were to utter the mantra "इन्द्रशत्रुर्वर्धस्व" with अन्त उदात्तः ॥ Antya Udaatta or Udaatta swara in the end of the mantra (to mean Prosper Oh ! Enemy of Indra)  instead they used the आद्य उदात्तः ॥ Aadya Udaatta swara in the beginning of the mantra (meaning Oh! Indra, one who has enemies, Prosper). So instead of asking for the rise and prosperity of a son to take revenge on Indra, the ऋत्विज  || ritvijas asked for the prosperity and glory of Indra who destroyed असुर  || Asuras. Thus ''वृत्रासुर  '''||''''' Vrittrasura the son of त्वष्टा ॥ Tvastha was born, an enemy of Indra, but eventually Indra was rewarded with glory in killing ''वृत्रासुर  '''||''''' Vrittrasura.''</blockquote>Siksha literature is very widely available based on the different शाखा || shaka (divisions) of different vedas. They are पाणिनीय शिक्षा || Panineeya Siksha'','' व्यास शिक्षा || Vyasasiksha, भारद्वाज शिक्षा || Bharadwaaja siksha, याज्ञवलक्य शिक्षा || Yaagnvalkya Siksha, पराशर शिक्षा || Paarasharee siksha, वासिष्टी शिक्षा || Vaasishtee siksha, कात्यायनी शिक्षा || Kaatyayanee siksha, माध्यन्दिनी शिक्षा || Maadhyandinee siksha, केशवी शिक्षा || Keshavee siksha, अमोघानन्दिनी शिक्षा || Amoghaanandinee siksha, माण्डव्य शिक्षा || Maandavya siksha, मल्लशर्म शिक्षा || Mallasharma siksha, स्वराकुष शिक्षा || Svaraakusha siksha, षोडष शिक्षा || Shodasha slokee siksha, नारदीय शिक्षा || Naaradeeya siksha, मान्दुकी शिक्षा || Maandukee siksha, स्वरभक्तिलक्षण शिक्षा || Svarabhaktilaskhana siksha, अवसाननिमय शिक्षा || Avasaananirnaya siksha, वर्णरत्न प्रदीपिका शिक्षा || Varnaratna pradeepikaa siksha among many others.

An example of such wrong utterance :            <blockquote>''मन्त्रो हीनः स्वरतो वर्णतो वा मिथ्या प्रयुक्तो न तमर्थमाह ।''</blockquote><blockquote>''स वाग्वज्रो यजमानं हिनस्ति यथेन्द्रशत्रुः स्वरतोपराधात् ॥''</blockquote>If a mantra is devoid of a वर्ण || varna or letter, or has wrongly utterances or स्वर || swaras, then it does not the give the meaning it is intended to and produces a false meaning. This incorrectly and improperly uttered mantra becomes a वाक्वज्र || vakvajra (word weapon) and is capable of destroying the यजमणि || yajamani (performer of the yagna). Example is the famous story of Indra's Enemy, Vrittrasura whose origin was due to स्वरापराध ॥ swarapradha (wrong swara utterance) of a mantra.            <blockquote>'''''वृत्रासुर  जन्मं  || Vrittrasura Jananam''''' '':  त्वष्टा॥ Tvastha angered by Indra's killing of his son विश्वरूप  || Vishwaroopa, initiates an आभिचारिकं यागं  || aabhaicharikam yagam (a yagam performed to cause harm to an intended person) to procure a son to kill Indra. The ऋत्विज  || ritvijas were to utter the mantra "इन्द्रशत्रुर्वर्धस्व" with अन्त उदात्तः ॥ Anta Udaatta or Udaatta swara in the end of the mantra (to mean Prosper Oh ! Enemy of Indra)  instead they used the आद्य उदात्तः ॥ Aadya Udaatta swara in the beginning of the mantra (meaning Oh! Indra, one who has enemies, Prosper). So instead of asking for the rise and prosperity of a son to take revenge on Indra, the ऋत्विज  || ritvijas asked for the prosperity and glory of Indra who destroyed असुर  || Asuras. Thus ''वृत्रासुर  '''||''''' Vrittrasura the son of त्वष्टा ॥ Tvastha was born, an enemy of Indra, but eventually Indra was rewarded with glory in killing ''वृत्रासुर  '''||''''' Vrittrasura.''</blockquote>Siksha literature is very widely available based on the different शाखा || shaka (divisions) of different vedas. They are पाणिनीयशिक्षा || Panineeya Siksha व्यासशिक्षा || Vyasasiksha, भारद्वाजशिक्षा || Bharadwaaja siksha, याज्ञवलक्यशिक्षा || Yaagnvalkya Siksha, पराशरशिक्षा || Paarasharee siksha, वासिष्टीशिक्षा || Vaasishtee siksha, कात्यायनीशिक्षा || Kaatyayanee siksha, माध्यन्दिनीशिक्षा || Maadhyandinee siksha, केशवीशिक्षा || Keshavee siksha, अमोघानन्दिनीशिक्षा || Amoghaanandinee siksha, माण्डव्यशिक्षा || Maandavya siksha, मल्लशर्मशिक्षा || Mallasharma siksha, स्वराकुशशिक्षा || Svaraakusha siksha, षोडशशिक्षा || Shodasha slokee siksha, नारदीयशिक्षा || Naaradeeya siksha, मान्दुकीशिक्षा || Maandukee siksha, स्वरभक्तिलक्षणशिक्षा || Svarabhaktilaskhana siksha, अवसाननिमयशिक्षा || Avasaananirnaya siksha, वर्णरत्न प्रदीपिका शिक्षा || Varnaratna pradeepikaa siksha among many others.

== कल्पः ॥ Kalpa ==

== कल्पः ॥ Kalpa ==