Nietzsche said the true test of character is how much truth a man can tolerate.

We often succumb to the (invisible) danger of motivated reasoning - we use logic to support our pre-made judgements. We start with our conclusions and look for logical reasons that support them.

If you are not asking questions and trying to answer them on your own, you’re not thinking. And if you’re using other people’s words to answer the questions you are asking, you are living by other people’s words , and therefore, you are still not thinking.