Step 1: Hamel's Reflection on Language.
Hamel stated that language is the key to a nation's identity. He emphasized that French was the language of culture, literature, and civilization. Losing it would mean losing one's sense of identity.
Step 2: Hamel's Importance of the Mother Tongue.
He urged the students to value their native language, saying that it was not just a means of communication but a vital connection to their history and culture. He deeply regretted that the French language was being replaced.
Step 3: Conclusion.
Hamel's speech emphasized the significance of language as a cultural heritage and a crucial part of one's identity.
Final Answer: \[ \boxed{\text{Hamel highlighted the importance of language as an essential part of one's identity and culture. He expressed that French was the language of civilization, and losing it would mean losing a vital part of one's heritage.}} \]