cling to (one's) beliefs

To remain devoted to or entrenched in one's convictions, principles, or opinions, especially in a desperate or obtuse manner. In this ever-changing world, you can't just stubbornly cling to your old beliefs. You have to be flexible and able to adapt, or you're going to get left behind by the younger generations. If that corporate bigwig is still clinging to his beliefs that he is immune from prosecution, he's in for a rude awakening! When have you ever known Uncle Ned to change? That man will cling to his beliefs until the end of time.