Everything that happens in the mind is part of a causal chain. Meditation is the simple practice of watching the activity of the mind honestly and witnessing their results. Skillfulness is choosing to cultivate what brings benefit and letting go of what increases suffering. Simple common sense. And though tedious on the surface, much less tedious and much less painful that not training the mind.
"A Sangha is a community of resistance, resisting the speed, violence and unwholesome ways of living that are prevalent in our society. Mindfulness is to protect ourselves and others. A good Sangha will lead us in the direction of harmony and awareness. The substance of the practice is most important. The forms can be adapted." ~ Thich Nhat Hahn