The image of "land" embodies the poet's deep love for the motherland and mother earth, and his deep sense of hardship for the fate of the motherland.
The image of "the sun" shows the other side of the poet's soul: passionate and endless pursuit of light, ideal and a better life.
Objective explanation:
Image is a processed image of cognitive object, physical memory trace and overall structural relationship left by cognitive subject after contacting objective things according to the representation information transmitted by sensory source. This memory trace is a temporary connection between sensory source information and newborn agent information.
The neural basis of a single image is a cluster of neurons. Image is a physiological structure, a combination of effective information, and also a combination between images. A group of neuron clusters is equivalent to a group of information coding bodies, which correspond to (involve) specific sensory information representations. It carries the top-down connection of related sensory information and is an advanced information carrier. Image is also a structure bearing memory, not an illusion.