The Three Marks (tilakkhana)
All compounded things (sankharas) are impermanent
All compounded things (sankharas) are unsatisfactory
All dhammas are without self
Three characteristics of Paticcasamuppanna (dependently arisen phenomena)
Anicca - impermanence (changing)
Dukkha - suffering
Anatta - no self
Anicca
"You cannot step into the same river twice"
Impermanence of the Five Aggregates is shown:
Form is like a lump of foam (phena-piṇḍa);
Feeling is like a water bubble (bubbula);
Perception is like a mirage (marīci);
Formations are like a plantain trunk (kadali-kkhandha);
Consciousness is like an illusion (māyā).