The selfless end up serving those who are not. They become the pawns in someone else's game. And just like in chess, they are readily expended.
Look out for others, but not to your own exclusion. We learn to care by caring about ourselves. Treat others the way you would like to be treated.
In a world that takes, be the one who gives. Let your every moment be a blessing to those around you. In a sea of sameness, make a difference.
You may never know what effect you have. Some will see it, and some will turn away. Creatures of darkness cannot stand the shining of a light.
It is through our own eyes that we see the world. An honest heart will behold it clearly. Use that vision to make things better than you know.