"I am ready and willing to testify before the representatives of our Government as to my own opinions and my own actions, regardless of any risks or consequences to myself. But I am advised by counsel that if I answer the committee’s questions about myself, I must also answer questions about other people and that if I refuse to do so, I can be cited for contempt. My counsel tells me that if I answer questions about myself, I will have waived my rights under the fifth amendment and could be forced legally to answer questions about others. This is very difficult for a layman to understand. But there is one principle that I do understand: I am not willing, now or in the future, to bring bad trouble to people who, in my past association with them, were completely innocent of any talk or any action that was disloyal or subversive."
January 1, 1970
https://en.wikiquote.org/wiki/Fifth_Amendment_to_the_United_States_Constitution