The Vachanamrut is a nectar of all spiritual & philosophical knowledge.
It contains all the spiritual & philosophical understanding of questions asked by various saints & devotees. With replies to the question given by Lord Swaminarayan. Many times the Lord asks & answers the questions.
Each Vachanamrut starts with the day, month, year, time, place where the discourse was given, who attended the discourse, who asked questions, etc
The great Saints Muktanand Swami, Gopalanand Swami, Nityanand Swami, Shukanand Swami & Brahamand Swami heard and compiled the original words of Lord Swaminarayan and got them authenticated by Him.
There were thousands of Vachanamruts but our Lord has selected 273 Vachanamrut's.
Note: Discrepancy of date in last Vachanamrut; this is due to use of different calendar (the last Vachanamrut is dated after Maharaj returned to Akshardham i.e. after He passed away; at the time the Gujarat and Saurashtra calenders were slightly different).