Wanting is a wish, needing is a necessity. I want world peace, seas without plastic and animals in freedom. But I also argue with friends, drive cars with tires made from 4 gallons of oil and go to the zoo.
The feeling for wishes is always easy to have. A little imagination is enough. The real doing has a different feeling, a different energy. It is doing instead of wanting. It is a necessity, something that must be.
You always have exactly what you are convinced you must have. What you absolutely must have is not a variable that you let be taken away. Your life always falls back on your own standards, on what must be necessary.
A doer manifests by giving reality to a wish. What desire do you make your necessity out of? You have what you have to have.