This is an area where choosing your parents carefully can pay off. Since none of us have that opportunity, the next consideration is how we can make the most of ourselves in spite of those around us from conception until we are aware of ourselves as individuals.
Attitudes: those things put into our brains before we have awareness making it impossible to filter. Put another way, our parents should teach us by example and with words what we need to know in order to maximize our lives. As a child it never occurred to us to say, “Really, mom, that just can’t be correct. I’m just not going to permanently store what you just did/said.” Instead, as babies we are data sponges and we soak up everything and store it for future use. That’s good as long as the data is accurate and useful for us in building out lives. That’s bad when it is not. As we grow older we find stuff in our memories that we no longer hold to be true or useful. Now we have the problem of deleting. That simply doesn’t work well. Instead we must build a new structure in our brains that represents what we believe to be correct/true. That is time consuming and difficult. Some ideas may never be tested and we may never be aware of the fact that they don’t fit reality as we intellectually believe it to be. Fact is that we need to be aware that we are always a work in progress and that it is entirely possible that we didn’t start with the best of data.