As a Investor what you want to become "Player or the Referee"

There are two types of investors. One who just refers the calls and others are those who actually implement those calls. I will explain it with a short story.

Ram & Shahil were quarreling in class. Both didn’t even want to listen to each other. To solve this, the teacher asked Ram to stand on one side of the desk & Shahil on the other side. The teacher placed a ball in the centre of the desk & asked, “What’s the colour of the ball?” Ram said white & Shahil said black. Both answers were different & they again started arguing. The teacher then asked them to exchange their places & asked, “Now, what’s the colour of the ball?” This time, Ram said black & Shaihil said white. They were surprised that both were right. The teacher explained, “This ball has 2 colours. It looks white from one side & black from the other. Both answers are correct. The only difference is how you view it.”