The phrase "are one's lot" generally means that something is one's fate or destiny, usually in a negative sense. So, the antonyms for this phrase could be words or phrases that indicate a positive or empowering alternative. These antonyms might include "opportunity," "prospect," "chance," "lucky break," or "act of kindness." Each of these terms suggests that someone has the power to change their circumstances and improve their lot in life, rather than be resigned to a predetermined fate. By embracing these antonyms, we can empower ourselves to take control of our lives and create our own destiny.