"So gifted in his art that no one in our century could come near to him"
"His work is as a caress for the eye"
"He is the leader, the master of the Brabant landscape painters"
"Painter and draughtsman of great sensitivity and with a fine cool eye in front of nature, sometimes so surprisingly direct and fast that he seems to belong to the nineteenth century"
"One of the most revolutionary painters of the seventeeth century"
"He does not simply reproduce nature as it is, but literally embraces it"