Fate of Insincere Disciples

"(Many) disciples who get initiation from their preceptors become insincere and faithless and ungrateful. An insincere disciple betrayed Lord Jesus. Some of the disciples of Lord Buddha became his traitors and enemies. They left their Guru and did much harm and mischief. Even now there are plenty of insincere disciples who cheat even their Guru. What a shame! What a sad state! Their lot is highly deplorable! Such disciples will meet with miserable death. They will be tortured in the Maharaorava hell. They will be thrown in lower wombs in the next birth and suffer from incurable diseases." (pg. 196, How to Cultivate Virtues and Eradicate Vices by Swami Sivananda).

"An insincere man cannot make even an iota of spiritual progress.... Sincerity is one of the important qualifications in the path of spirituality. Throughout the Gita, the one ringing note is that the aspirant in the path of Self-realisation should possess the important virtue, sincerity. The Sanskrit term for sincerity is Arjava. Look at the sincerity of Lakshmana and Bharata  and their unflinching  devotion  to Lord Rama. Wherever  there  is sincerity there is devotion  also. Savitri was very sincere to her husband Satyavan.  Maitreyi was very sincere to her husband Yajnavalkya. So she received  the Atma-Vidya from him. Mira was very sincere towards her beloved Lord Krishna. She had the good fortune  to have Darshan  of Giridhar Gopal. A sincere friend, a sincere  devotee,  a sincere husband,  a sincere wife, a sincere son and a sincere  servant are gods on earth. There is no virtue greater than sincerity. It should be developed at all costs by one and all.

"(An insincere man engages in) double-dealing... cunningness, crookedness, petty-mindedness... He tries to pose for a sincere man by trying to please his friends in a variety of ways, by gifts, artificial sweet and nice speech born of cunningness and other cunning methods. But he does not know that there are better intelligent people to detect the crow which shines in borrowed feathers. He is soon found out.

"O friend...! You have become insincere on account of intoxication from selfishness and greed. You do not know what you are exactly doing. You have a clouded understanding. Your conscience will prick you severely at one time. Your heart will bleed when you come to your senses. Your heart must bleed through repentance with a contrite heart. Then only can you purify yourself. Do Japa. Sing Lord's Name. Fast on Ekadasi. Do not take even a drop of water. You will develop sincerity and through sincerity you will achieve freedom, peace and perfection.

"Hypocrisy, arrogance, conceit, wrath, harshness, unwisdom, deceitfulness, falsehood...cunningness, crookedness, petty-mindedness are connected with insincerity."

(pgs. 191, 192, 194, 195, How to Cultivate Virtues and Eradicate Vices by Swami Sivananda)