To palter with us in a double sense:
And keep the word of promise to the ear,
But break it to the heart.

from Frederick Douglass – What to the Slave Is the Fourth of July? on Rap Genius

Meaning

This is based on a line from Macbeth Act V Scene 8. The actual line is:

Accursed be that tongue that tells me so,
For it hath cow’d my better part of man!
And be these juggling fiends no more believed,
That palter with us in a double sense;
That keep the word of promise to our ear,
And break it to our hope. I’ll not fight with thee.

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