Yoda: Yes, a Jedi’s strength flows from the Force. But beware of the dark side. Anger, fear, aggression; the dark side of the Force are they. Easily they flow, quick to join you in a fight. If once you start down the dark path, forever will it dominate your destiny, consume you it will, as it did Obi-Wan’s apprentice.
Luke: Vader… Is the dark side stronger?
Yoda: No, no, no. Quicker, easier, more seductive.
Luke: But how am I to know the good side from the bad?
Yoda: You will know… when you are calm, at peace, passive. A Jedi uses the Force for knowledge and defense, NEVER for attack.
Following up on the magical quote from Alice in the movie Closer, on a bigger scale, this is why I believe that life is what you make of the chances you are given. You need a lot of luck, but given that context it asks for discipline to make the right choices. The dark side can be tempting as Yoda already new: