What Buddhists Believe
All compounded things are impermanent.
All emotions are pain.
All things have no inherent existence.
Nirvana is beyond concepts.
- Siddharta Gautama (Buddha)
The Four Seals of Dharma
If you cannot accept that all compounded or fabricated things are impermanent, if you believe that there is some essential substance or concept that is permanent, then you are not a Buddhist.
If you cannot accept that all emotions are pain, if you believe that actually some emotions are purely pleasurable, then you are not a Buddhist.
If you cannot accept that all phenomena are illusory and empty, if you believe that certain things do exist inherently, then you are not a Buddhist.
And if you think that enlightenment exists within the spheres of time, space and power, then you are not a Buddhist.
- Dzongsar Jamyang Khyentse Rinpoche
from Rinpoche's book: "What Makes You Not A Buddhist"