How does P.G. Wodehouse use imagery in Life with Jeeves?

Imagery:

"To look at you, one would think you were just an ordinary sort of amiable idiot—certifiable perhaps, but quite harmless. Yet, in reality, you are a worse scourge than the Black Death. I tell you, Bertie, when I contemplate you I seem to come up against all the underlying sorrow and horror of life with such a thud that I feel as if I had walked into a lamp post."

"'Oh, that!' said young Bingo airily. 'That was settled days ago. The dove of peace is flapping its wings all over the place. Everything's as right as it can be. Jeeves fixed it all up. He's a marvel, that man, Bertie, I've always said so. Put the whole thing straight in half a minute with one of those brilliant ideas of his.'"