How does Miguel de Unamuno use imagery in Saint Emmanuel the Good, Martyr?

Imagery:

I know well enough that one of those leaders of what they call the Social Revolution said that religion is the opium of the people. . . . Yes, opium it is. We should give them opium, and help them sleep, and dream. I, myself, with my mad activity am giving myself opium.

He [Lazaro] became one more link between the two Valverde de Lucernas, the one at the bottom of the lake, and the one on the surface that is reflected in it. He was another of our dead and also, in his own way, one of our saints.