A warrior of light knows that certain impossible battles are worth fighting and so he/she is not afraid of being disappointed, knowing the power of his/her love.
The whole idea of emotions being something we can't escape as humans, but that deep suffering that comes from resisting them, we can move out of that just by not resisting anymore. But it takes a really brave warrior soul to sit there in these emotions that admittedly don't feel good in the body.
Defeat exists but not suffering. A true warrior knows that when he loses a battle, he is improving the skill with which he wields a sword. He will be able to fight more skilfullly next time.
We are responsible for everything that happens in this world. We are warriors of light, and with the strength of our love and of our will we can change our destiny and that of many other people.