This may sound strange as we assume that we are already independent thinkers, but it is only when we start asking questions about our self, that we can actually start to be independent. Otherwise, we are just going along with the collective, hoping ‘they’ are right. It’s quite a shock to realise that, with the best intention, we haven’t an original thought in our head. :-O
Independent: free from outside control; not subject to another’s authority.
All that is needed is to realise where our thinking came from.
That is independent thinking.
Freedom is freedom from our mind’s memories.
Now, we realise the psychological prison we have been living in.