Someday you’ll disagree with a hero you used to quote. That’s not betrayal; that’s graduating.

Outgrowing somebody’s ideas is not a betrayal of them. You took what was useful at the time, and part of what they gave you was the equipment to think for yourself, which eventually gets pointed back at them. That is what learning from someone produces when it works. Permanent agreement would be a sign that not much had happened.

You can keep what was good and drop what no longer holds. Say clearly what you still take from them and where you now part company. Nobody worth learning from expected you to stay where they left you.