大毘盧遮那成佛經疏 2.53

2.53

Twenty-fourth: regarding "What is the pond mind? It means according with the dharma of thirst without insatiability": just as with a pond, though many waters flow into it, it is never satiated. This mind is also like this: if matters such as fame, profit, and retinue gather upon their person, they are never satiated, even extending to the dharmas they study. It is like having already obtained milk-porridge, but not applying oneself to eating it quickly, yet thirsting further for other flavours. Here, few desires and contentment serve as the antidote.