Dimensionless
Fear, despair, love, expectations, happiness, hatred, enthusiasm, frustration, depression, anxiety and dreams. Everything which is not a reality, everything which is just in our minds and based on beliefs, assumptions is dimensionless.
It's an infinite loop in an infinite space, it stops when you stop it. Else, it continues to eat your mind up. Ever wondered how our dreams are not connected anywhere and is completely meaningless? It's because it's dimensionless, it roams in an infinite space which has no starting point nor an ending point. It has no proper base, it's nowhere in the reality. Hence, the loop continues.
It stops, when you wake up. It stops when your mind comes into reality. And reality is a clear and a straight road. Every situation can be handled if one masters to accept the reality and work on it.
Accept the situation no matter how harsh, unfair or disturbing it is. Only when you completely accept a situation, you can change it. But we cannot be robots all the time having a clear-cut road every single time. We are humans after all, we are volatile, we do fall in dreams but we do need to come out of them before it causes a huge damage.
In the end, those dimensionless thoughts are the ones which differentiate us from the animals. And embrace them.