It is a basic truth that gratitude gives birth to gratitude and that ingratitude creates more ingratitude.
This is because gratitude reaches God, while ingratitude reaches dark forces.
This is why those who are always grateful naturally enjoy happiness and good fortune, while those who are ungrateful and constantly complain are unhappy and become more and more unfortunate.
As the founder of the Omoto religion aptly wrote, "If you rejoice, joyous things will come to you"