Expect to change your mind as life presents new challenges.
Expect to change your mind as you learn more and gain new experiences.
As you learn more about life (and overcome new obstacles), your thinking will change. Your mind adjusts itself to account for the new information it has obtained. Your intellectual capabilities become refined, you see things more clearly and your outlook changes.
Don't be so wedded to your ideas that you find it impossible to change. Just because you think differently now doesn't mean your old thinking was incorrect - it just doesn't necessarily apply any more.
Expect your mind to change and roll with it.