The mind is like a leaf in the wind

Ajahn Chah (ajahnchah.org) via Ven. Sujato, Ellie Askew, Dhr. Seven (ed.), Wisdom Quarterly

Right now we are sitting in a peaceful forest. Here, if there's no wind, a leaf remains still. But when a wind blows, the leaf flaps and flutters. The mind is similar to that leaf. When it contacts a mental impression, it also flaps and flutters, according to the nature of that mental impression. And the less we know of Dharma, the more the mind will continually pursue mental impressions. Feeling happy it succumbs to happiness. Feeling suffering it succumbs to suffering. It's in a constant flap.