Sailing helps to understand the art of wind.
A boat needs a dock, as a people need a home.
The basic of sailing is to know how to use downwind or upwind. The speed of the sailboat depends on the efficiency of using wind. The more winds apply on the sails, the higher speed the sailboat will have. In downwind, it is easy to blow the wind with the sails. When it turns to upwind, as the boat against the wind. How can the sailboat go forward? Actually, the sailboat will go through a "Z" shape route. By doing that, the boat partially against the winds.
During sailing, trimming the sails (mainsail and jib), need the directions, intensity (tight or loose). The ropes control the lifting of sails. Also, the management of ropes is also an art.
It should be noted that the winds are always changing. That means it was a dynamic process. You need to monitor the wind at all the time, and conduct the proper trimming.
Sailing is a magic world of understanding wind.