This isn't a real suicide-thing. This is probably one of those cry-for-help things.
This is a chemical burn. It will hurt more than you've ever been burned before. You will have a scar.
All right, if the applicant is young, tell him he's too young. Old, too old. Fat, too fat. If the applicant then waits for three days without food, shelter, or encouragement he may then enter and begin his training.
Reject the basic assumptions of civilization, especially the importance of material possessions.