Characters in the artwork
Think - big seal script.
The top is Wood (left) + Eye (right), means "Observe trees", the bottom is Heart. Ancient Chinese believed that people think from heart, at least heart is important same as the brain in thinking.
The character means "Think or Thinking".
Elephant - shell bone script.
Think Elephant = Imagine. Why is not "Think Pig", "Think Dog", "Think Horse", "Think Tiger" ?
There were elephants living in Yellow river area long long time ago. Ancient Chinese saw elephants, so they could draw elephant in shell bone script. However, as the weather changed, the forest in Yellow river area disappeared, many elephants died due to lack of food, some might have moved to south. The elephants gradually disappeared in Yellow river even most of China. Gradually, the younger generation had ever seen elephants, they only heard the older generatuon told them what elephant looks like, they had to imagine the animal in their brain. Therefore, thinking elephant is a process of imagination.
Because people could easily see all other animals, didn't need imagination, elephant is the only animal in ancient China people needed imagination to get its image.