What a way to ask a question, no answers nor traces of what you're trying to ask.
<u>Answer:</u>
A great leader is the one who does not do great things on his own. He should rather encourage the people to do great things, achieve their goals, accomplish their tasks and make success. He should influence others to accomplish the objectives.
A great leader is the one who does not see his own benefits and advantages but should take into considerations the goals of the organisations and the people first and then should give his own goals some priorities. He is should be absolutely selfless and be very passionate, determined towards achieving and for the betterment of the organisation.
King Hrothgar - The king of the Danes. Hrothgar enjoys military success and prosperity until Grendel terrorizes his realm. A wise and aged ruler, Hrothgar represents a different kind of leadership from that exhibited by the youthful warrior Beowulf.
I think it means to have hard boat shells meaning hard sides as in something that is hard and wont brake and will last in strong storms for a period of time.