I know exactly what nicolau means, and I agree with him.
You cannot choose what you believe. Belief is not like a switch that you can choose to turn off or on, left or right.
You believe what you believe until something comes along to influence that belief enough to change it - you have no control.
For example, it may be nice to believe in fairies at the bottom of the garden. I would love that to be true. But I cannot say 'I choose to believe in fairies' because, no matter what I state, say or do, I DON'T believe in fairies and NOTHING can change that ( unless a fairy knocks on my head and says 'excuse me!' ) Our beliefs are not fixed, they can change, but not without significant evidence.
And it really narks me too when I say I don't believe in God and people say 'that's your choice'. NO IT ISN'T!!!! If I were going to choose then I would much prefer to believe that there was a God up there that cared for us.
But we can't choose what we believe.