For those who observe the fast religiously and regularly
The Satyanarayan Puja is a Hindu religious observance. It is a ritual performed by Hindus before/on any major occasion like marriage, house warming ceremony etc. It can also be performed on any day for any reason.It is believed the ceremony originated in Bengal as Satya Pir ritual performed by all communities (Hindu, Muslim and buddhists) and later in 19th century morphed into Satyanarayan puja.
The Satyanarayana Puja is usually done on the Purnima day of every month (the day of the full moon) or a Sankranti. It is also done on special occasions and during times of achievements as an offering of gratitude to the Lord. These occasions include marriage, graduation, new job, and the purchase of a new home to name a few. In addition, it is said that a devotional performance of this puja will bear children to couples trying to start a family.
Shri Satyanarayan katha comes from the Skandha purana, Reva kaanda. Suta Puraanikji narrated these stories, in Neimishaaranya to the Rishis who were performing a 1 ,000 year yajna for the benefit of mankind led by Shounakji .
For those who observe the fast religiously and regularly, there are some great lessons to be learned from the 'katha'
This is shown by characters who ignored their promise to perform the puja after their wish had been fulfilled. They suffered as a result. Therefore one is to deduce that one must stick to the promise given to the Lord in exchange of the desire fulfilled by His Grace. One is not to ignore or/and forget the Lord's Grace. Prasad is symbolic of God's Grace which Kalavati ignored as she learned of her husband's safe return.
One can understand her eagerness in wanting to be re-united with her beloved, but one must understand that if one forgets to be thankful for gifts received from the Lord, one would have to go through another test until one remembers to remember.
When the rich merchant is asked what the boat contains, he untruthfully replies 'Only dry leaves' and the Mendicant says 'So be it' The above incident tells us that the spoken word has power. What you speak, manifests. Hence one must not speak an untruth. Especially an inauspicious untruth.