Pretty sure it was in one of his books I read a tale which always stuck in my mind, and very germane to the OP's question:
Basically the monk goes to the Abbot of his then Wat and asks to transfer to some other Wat where he feels it would be more conducive to his meditation practice.
The Abbot reflects on the request then asks the monk to observe the temple dogs, how restless they are, how they scratch and shuffle, then move somewhere more comfortable, or somewhere a little cooler. Then insightfully explained that the dogs don't realise that where ever they go, they take their fleas with them.