Wicca 101 - The Wiccan Rede - Short Version
Bide the Wiccan Law ye must, In Perfect Love and Perfect Trust, Eight words the Wiccan Rede fulfill An' ye harm none, Do what ye will. What ye send forth comes back to thee So ever mind the laws of three Follow this with mind and heart Merry Meet and Merry Part.
If you looked at the long version of the Rede first you will notice that this one is considerably shorter.
In the first paragraph we talk about harming none and acting in accordance with true will (Do what ye will). The idea is that if we are truly trying to do the things that are best for us they will also be good for society and those around us. Of course knowing the difference between our true will and the things we just really want can be difficult that is why they give the advice of acting in "perfect love and perfect trust".
The second paragraph talks about the repercussions for not acting in accordance with true will, as well as the rewards. The law of three says the things we do have repercussions: physically, emotionally and spiritually. If we act in anger against those around us people will see us as a mean person, we will lose friends, we may face legal action or get into fights, and we will not grow spiritually. If we act in love we will be seen as a good person, we will gain friends and surround ourselves with good people, and our spiritual lives will improve.
This is the heart of Wicca, the idea that we are taking charge of the decisions in our lives and working toward spiritual and personal growth. We acknowledge that we have decisions to make in life, and we know that if we make the wrong ones what the repercussions can be. We choose to walk a path of self-improvement. Improvement for ourselves and improvement for the society we live in.