Don’t be wishy-washy. Have an opinion, have a belief. Know why you have it, know why you believe it. Then live it. “Actions speak louder than words” may be cliché but it is true. If you truly believe something, your life, your actions will reflect it.
Now, if at some point you find other information that persuades you to change your opinion or belief, fine. If you find you were mistaken—close cousin to wrong—don’t be prideful and stick to your old belief. Being unwilling to change beliefs is the downfall of many good intentions. Being unwilling to admit a mistaken belief puts us into bad patterns and habits.