The Buddha said that the cause of all our suffering is our selfish desires. Our cravings to have things different than they are at present is what creates conflict and pain
Yet ask most anyone if they think they're selfish and most will say "certainly not!". However we would never be upset if that were the case
We get upset because things don't go our way - period!
We want what we want when we want it. And we want it now. This is truly the definition of selfishness
We hear talk about acceptance - yet can you accept it when its not going your way? Can you still feel compassion, grace and equanimity in the face of things not going your way?
That's the yoga I try to practice. Its not easy at all - because I'm a selfish person.