To provide a clear and concise answer, it is necessary to know which specific speech by Johnson is being referred to, as there have been multiple speeches delivered by individuals named Johnson throughout history. Once the specific speech is identified, it is important to analyze the context and content of the speech to determine its main message.
For example, if we are referring to a speech by President Lyndon B. Johnson, one of his notable speeches is the "We Shall Overcome" speech delivered in 1965. In this speech, President Johnson addressed the nation about the need for voting rights and equal opportunities for African Americans.
The main message of Johnson's speech was to advocate for the passage of the Voting Rights Act, which aimed to eliminate racial discrimination in voting practices. He emphasized the importance of equal access to voting rights and called for unity and understanding among Americans, stating that "every American citizen must have an equal right to vote."
Johnson's message in this speech was a commitment to racial equality, justice, and the importance of ensuring that all citizens have the right to participate in the democratic process.
Please note that without specifying which Johnson's speech is being referred to, it is not possible to provide a more accurate and specific answer.