The Cause of Suffering--samudaya

The principle cause of suffering is the attachment to "desire" or "craving", tanha. Both desire to have (wanting) and desire not to have (aversion).
  1. desire for sense-pleasures--kama-tanha,
  2. desire to become--bhava-tanha,
  3. desire to get rid of--vibhava-tanha.
The desire for sense pleasures manifests itself as wanting to have pleasant experiences: the taste of good food, pleasant sexual experiences, delightful music.

The desire to become is the ambition that comes with wanting attaiments or recognition or fame. It is the craving to "be a somebody".

The desire to get rid of the unpleasant experiences in life: unpleasant sensations, anger, fear, jealousy.

The clinging to desire comes from our experience that short-term satisfaction comes from following desire. We ignore the fact that satisfying our desires doesn't bring an end to them.