His Holiness Jigme Phuntsok Rinpoche
What's recommended is that if you have a good experience, don't get too excited. And if you have a bad experience, don't mistake it for a serious deviation or a sidetrack that you have to find your way back from. If you have a bad experience, just continue practicing as you were. In other words, whatever happens, just keep looking at your mind.
Like waves, all the activities of this life have rolled endlessly on, one after the other, yet they have left us feeling empty-handed. Myriads of thoughts have run through our mind, each one giving birth to many more, but what they have done is to increase our confusion and dissatisfaction.
Dilgo Khyentse Rinpoche