By Mahanidhi Madan Gopal Das: To confirm the connection between Radharani, the Kartik vrata and the uniqueness of this month, Shri Rupa Goswamipada says Radha is Kartik-devi, Urjadevi, Urjesvari, and the Kartik-devata.
The benefits of other vows last for only one life, but the benefits from a Kartik vow last for 100 lives, vratasyoktamphalamjanmasatanugam (SkandaPurana: HBV16.45)
In Bhakti-rasamrta-sindhu, Shri Rupa Goswamipada cites the Padma Purana to prove the special effect of observing Kartik in Vraja-dhama:
"Shri Krishna gives sense enjoyment or liberation, but never bhakti to those worshiping Him outside of Vraja Dhama, bhuktim-muktim-harir-dadyad-arcito-anyatra-sevinam. However, one will quickly obtain Hari bhakti by worshiping Damodara in Mathura/Vrndavana during Kartik—harer-bhaktir-labhyate- kartike-naraih-mathurman-sakrd-api-damodara-pujanat."
Shri Jiva Goswamipada comments: "By the power of just once worshiping Shri Krishna in Mathura/Vrndavana during Kartik, even an UNQUALIFIED person will OBTAIN BHAVA, love for Krishna—mathura-karttikayoh-sangame-pujanam-ghatate-tada-yogyata-virahiten-api-vastu-prabhavat-prapyate- eveti-bhava."
The Skanda Purana says, "The Kartik vrata is always dear to Shri Kesavaji, sarvada-kesava-priyah. If during Karttika one performs even a few pious deeds for the pleasure of Vishnu/Krishna, one will derive indestructible benefits, kincit-kriyate-punyam-visnum-uddisya-karttike, tad-aksayam-bhavet-sarvam-satyoktam-tava-narada."
Once Shri Rupa-manjari said, "O Krishna! You delight the world with Your flute by singing the glories Kartika-devi Radha, the topmost form of pure love, premamūrti-varakārtikadevī, kīrtigānamukharī-kṛtavaṁśam." (Uttkalik-vallari 11)
The Padma Purana (Karttika-mahatmya) says, "Of the twelve yearly months, Kartika is the most beloved of Krishna—dvādaśāsv- api -māseṣu / kārtikaḥ -kṛṣṇa-vallabhaḥ."
"If one performs even a little Vishnu/Krishna puja during Kartika, one will definitely attain Vaikuntha—sampūjito- viṣṇur -alpa- dadāti / vaiṣṇavaṁ -lokam -niścitaṁ."
"Bhagavan Shri Hari, the Master controller, will be pleased if one offers a ghee lamp, or even just relights another person’s extinguished lamp, and He will give one a good destination—."dīpenāpi -hi –yatrāsau / prīyate -harir –īśvaraḥ / sugatiṁ- ca –dadāty- eva / para- dīpa –prabodhanāt
Five Liberation Vows
In Hari Bhakti Vilasa (17), Shri Sanatana Goswami quotes the Padma Purana (Uttara-khanda chapter 115), wherein Bhagavan Shri Krishna says:
"If one performs these five vows for the entire month of Karttika, one will attain liberation (mukti) to the spiritual realm:
Stay awake both Kartik Ekadasi nights (Hari-jāgaraṇam).
Daily sunrise bath (just before sunrise is best).
Caring for a Tulasi plant. (Daily watering, bathing, puja, plucking leaves and manjaris, praising, respecting and circling).
Finishing a charitable work previously started i.e. building a temple, digging a well.
Daily offering ghee lamps (dīpas)."
Radharani Month Kartik Vrata ki jai! Kartika-devi Shri Radhaki jai!
Jai Jai Shri Radhe!