Comparison between two minds shows that there is a vast difference between them, but it is difficult to define it. Some persons may have experienced in life how plants often respond to influences, especially to the human beings around them, how they often wither in a home where there is distress, disturbance, or disharmony, and how they often live longer where there is harmony. When their owners understand plants they become responsive to love, harmony and sympathy; often plants feel the absence of these qualities. The condition of a person's mind can be seen in its effect on the plants in his surroundings.