Final answer:
The shared theme between the passages is internal peace and self-awareness, emphasizing personal integrity, self-value, and true happiness over external achievements.
Step-by-step explanation:
The theme shared by these passages is internal peace and self-awareness which is closely related to option 4: true happiness is based on internal peace, not external success. The passages from various poets and texts speak on the importance of recognizing one's own worth, the value of education and self-cultivation, and the significance of personal integrity and morality over external achievements. They underscore themes such as being true to oneself, reflecting on one's actions, and finding contentment without comparison or competition. Furthermore, they highlight the importance of using knowledge wisely and valuing moral qualities over material success.