Bhagavad-gita 18.14 Endeavor means energy which is employed. For anything one does there must be some activity; that is the endeavor. The place must be favorable, the activities must be authorized, the doer (the man who is acting) must be expert, the instruments must be fit, and the help from the Supersoul must be adiquate. These are the five causes for success, and the opposite are the five causes for failure. Here a man is conducting business. If he goes to the marketplace it will be very nice, since there are so many customers. Similarly, one looking for spiritual life goes to where there are devotees and associates with them. One must go to a particular type of place for a particular type of activity, and the person acting must be well-versed, or expert, just like an expert salesman whose method of business is bona fide. The senses must be in order, to guard against cheating, hear offers, etc. Above all is the help from Supersoul, who dictates in such a way that everything is successful, spiritually or materially. Among the five factors portrayed here, the endeavor is the business which is being conducted.