While the origin of this quote is heavily disputed, the meaning still remains as true today as when it was first said decades ago. With so many different people's thoughts and opinions about any and everything - it is important to stand for worthy and positive causes that "you" care about (no matter how cliche some might think they sound).
Stand for making a difference
Stand for your rights
Stand for making this world a better place
Stand for giving a voice to the voiceless
Stand for equality
Stand for something, or [the alternative] fall for anything.