Tao Te Ching 68

He who in Tao's wars has skill
Assumes no martial port;
He who fights with most good will
To rage makes no resort.
He who vanquishes yet still
Keeps from his foes apart;
He whose behests men most fulfill
Yet humbly plies his art.  

Thus we say, 'He never contends,
And therein is his might.'
Thus we say, 'Men's wills he bends,
That they with him unite.'
Thus we say, 'Like Heaven's his ends,
No sage of old more bright.'