If there be no enemy there's no fight. If no fight, no victory and if no victory there is no crown.
No conquest can ever become permanent which does not show itself beneficial to the conquered as well as to the conquerors.
The best lesson which we get from the tragedy of Karbala is that Husain and his companions were rigid believers in God. They illustrated that the numerical superiority does not count when it comes to the truth and the falsehood. The victory of Husain, despite his minority, marvels me!
To say that we have a clear conscience is to utter a solecism; had we never sinned we should have had no conscience. Were defeat unknown, neither would victory be celebrated by songs of triumph.