four holy truths

Suffering is inherent in life.
Suffering and repeated lives are caused by craving.
Craving thus suffering can be destroyed.
Eightfold Path is the course leading to these.

Eightfold path is the way to achieve nirvana, these are

Right understanding,
Right thought,
Right speech,
Right action,
Right livelihood,
Right effort,
Right mindfulness, and
Right concentration.

(Buddhism)