"The principle of regularity (in payment) as set out by the Promised Messiah (as) is very fundamental. Even those who have little to eat have some sort of regularity in eating. It is not possible for someone to eat once and then stop eating for two months. Everyone, for whom it is possible, tries to be regular in his meals. This is why the Promised Messiah (as) has linked regularity in financial sacrifices to man's spiritual survival."