“When we are no longer able to change a situation – we are challenged to change ourselves.”
~ Viktor E. Frankl

More on changing your mind:
“If you don’t like something, change it. If you can’t change it, change your attitude.”
~ Maya Angelou
“To improve is to change; to be perfect is to change often.”
~ Winston Churchill
“Change your opinions, keep to your principles; change your leaves, keep intact your roots.”
~ Victor Hugo
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Change of mind
a decision to reverse an earlier decision. flip-flop, turnabout, turnaround, reversal, deciding, decision making – the cognitive process of reaching a decision. “a good executive must be good at decision making”