राज्यं हि सुमहत्तन्त्रं धार्यते नाकृतात्मभिः |
न शक्यं मृदुना वोढुमायासस्थानमुत्तमम् ||
- महाभारत, शान्ति
Governing a state is a huge responsibility. A person who has not conquered his senses can not carry out the responsibility. Also a person who is too soft and gets tired easily can not be a king.
- Mahabharatha, Shanti