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The Hitchikers Guide to the Galaxy has this to say on the subject of flying.

There is an art, it says, or, rather, a knack to flying.
The knack lies in learning how to throw yourself at the ground and miss.

Pick a nice day, it suggests, and try it.
The first part is easy.
All it requires is simply the ability to throw yourself forward with all your weight, and the willingness not to mind that it's going to hurt.

That is, it's going to hurt if fail to miss the ground.

Most people fail to miss the ground, and if they are really trying porperly, the likelihood is that they will fail to miss it fairly hard.

Clearly, it is this second part, th emissing, which presents the difficulties.
One problem is that you have to miss the ground accidentally. It is no good deliberately intending to miss the ground because you won't. You have to have your attention suddenly distracted by something else when you're halfway there, so that you are no longer thinking about falling, or the ground, or about how much it will hurt if you fail to miss it.

It is notoriously difficult to prize your attention away from these things during the split second you have at your disposal. Hence, more people's failure, and their eventual disillusionment with this exciting and spectacular sport.

If, however, you are lucky enough to have your attention momentarily distracted at the crucial moment by something shocking, such as a bomb going off in your vicinity, or by spotting an extremely rare species of beetle crawling along a nearby twig, then in you astonishment you will miss the ground compleltly and remain bobbing just a few inches above it in what might seem to be a slightly foolish manner.

This is a moment for superb and delicate concentration.
Bob and float, float and bob.
Ignore all considerations of your own weight and simply let yourself waft higher.

Do not listen to what anybody says at this point because they are unlikely to say anything helpful. They are most likely to say something along the lines of "God G-d, you can't possibly be flying!"
It is vitally important to not believe them or they will suddenly be right.