Our beliefs can change and impact our entire behaviour, so putting in the right thought while ruminating is necessary.

There's a term for this, a self-fulfilling prophecy, precisely known as an individual's expectations or beliefs that can influence their behaviour, causing the beliefs to become true.

Yes, this happens, and it's for real!

We all know it, not by the given umbrella term but instead generally because many people have experienced it.

Like when you get nervous before your speech and have this notion that everything will not end up well.

Due to this, you garble your speech and stumble while speaking, turning your belief into a reality.

That's why putting some optimistic sense into your thoughts is essential.

Although it isn't easy, as we can't always control our thoughts, yes, there's no harm in believing in something positive.