If you have practiced EFT (Emotional Freedom Technique) for any length of time, you have surely heard the term, borrowing benefits.
Gary Craig accendently discovered this phenomena in one of his early EFT classes he was conducting. While he was working with a participant on stage, class members tapped along with him and discovered their own issues where diminished or eliminated too.
This discovery is important because it allows us to benefit from being in a group where EFT is being used, almost like osmosis. This is why I believe that mastermind groups that use EFT can take its members to greater heights of success and goal acheivement than mastermind groups and goal setting without using it.