How does demosthenes overcome obstacles to reach his goal?

Demosthenes overcame obstacles primarily through relentless practice and determination. He faced challenges such as a speech impediment and a lack of formal education but worked tirelessly to improve his oratory skills by reciting speeches while running and using pebbles to articulate better. His commitment to self-discipline and continuous improvement ultimately enabled him to become one of ancient Greece's greatest orators, effectively advocating for Athenian democracy. His perseverance exemplifies the power of dedication in achieving one's goals.