Great leaders are willing to ...

Great leaders are willing to sacrifice their own personal interests for the good of the team.
Great leaders are willing to sacrifice their own personal interests for the good of the team.

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A leader is best when people barely know he exists, when his work is done, his aim fulfilled, they will say: we did it ourselves.
To be prepared for war is one of the most effective means of preserving peace.
He who is prudent and lies in wait for an enemy who is not, will be victorious.
From warriors ravens grew red And with their leader a host attacked.
 Taliesin
If I am walking with two other men, each of them will serve as my teacher. I will pick out the good points of the one and imitate them, and the bad points of the other and correct them in myself.

Quotes from the same author

Whatever you do in life, surround yourself with smart people who'll argue with you.
You can't let praise or criticism get to you. It's a weakness to get caught up in either one.
Never mistake activity for achievement.
Talent is God given. Be humble. Fame is man-given. Be grateful. Conceit is self-given. Be careful.
Be true to yourself, help others, make each day your masterpiece, make friendship a fine art, drink deeply from good books - especially the Bible, build a shelter against a rainy day, give thanks for your blessings and pray for guidance every day.