The Five Khandhas - The fifty cetasikas

Sankhārakkhandha (the fifty cetasikas which are not vedanā and saññā) is real;  it can be experienced. When there are beautiful mental factors (sobhana cetasikas) such as generosity and compassion, or when there are unwholesome mental factors such as anger and stinginess, we can experience sankhārakkhandha. All these phenomena arise and fall away; sankhārakkhandha is impermanent.
Topic 175