After overcoming obstacles, one can find hope. This is indicated by the phrase "เมื่ออุปสรรคผ่านพ้นไปแล้วย่อมพบความสมหวังได้" which translates to "When obstacles have passed, one can find hope." The previous lines in the text mention disappointment, mistakes, and everyone experiencing errors before finding hope. Therefore, the correct interpretation is that after going through difficulties, one can find hope.