"Any person who contributes to prosperity must prosper in turn"

This quote by Earl Nightingale speaks to the concept of the law of domino effect. It suggests that when a person adds to the success of others, they will in turn be rewarded with prosperity. This might suggest that when a person strives and puts in effort to assist others, they will be rewarded with success and abundance. It could also indicate that when an individual is generous and kind to others, they will be rewarded with compassion and generosity in return. This quote motivates individuals to be generous and to contribute to the success of others, as it will ultimately lead to their own success. It is a tip that when we give, we will receive in return.