"It is difficult, if not impossible, for most people to think otherwise than in the fashion of their own period."
George Bernard Shaw (1856-1950) Irish writer.
By "period" Mr. Shaw means thinking, doing, and saying what everyone you know is thinking, doing, and saying, only because that is what they are thinking, doing, and saying.
If you find yourself doing that you're little more than just one of many sheep in the flock, mindlessly following many other sheep.
It's ok, to a point, to follow, just make sure you do so thoughtfully, because you've decided that is what you should do.