Explanation:
1.The introductory words reflect sadness and racial discrimination, the author longs for the day when racial discrimination will no longer exist.
2.The last words of the introduction of the green book reflect concern on the part of Victor Hugo Green, who states that black travelers are discriminated against and not offered the same security and benefits that white travelers enjoy, such as room and board.
The black traveler often had to face danger and discrimination, therefore the author expresses the importance of equality and longs for the day when racial hatred will no longer exist.
