1) The speaker is addressing students and sharing lessons from their life experience and struggles.
2) They emphasize the importance of having dreams and goals, self-motivation, never giving up in failure, creating a study time table, and dedicating hard work towards achieving one's dreams.
3) The key message is that through motivation, perseverance, and dedicating time to one's studies and dreams, the students have the ability to achieve great things and help raise the reputation of their family, school, and nation.