Some people come on the path like going to a restaurant. After you eat in a restaurant, you don’t think about the restaurant for many hours, right? So they are fulfilled and they don’t come back.
There are other people who might be going through a difficult time and they walk off the path maybe due to their bad habits. But then they do come back also. I have seen people come back to the path after 15, 20 or even 25 years. We don’t have to worry about it.
Your job is to throw the seeds out on the field. Wherever it grows, it grows. You can’t be watching out for every seed to see whether it has grown or not.