This quote is comparing different attitudes towards overcoming obstacles. A pessimist is someone who looks at the negative side of things and usually complains a lot. In this case, the pessimist is complaining about a difficult situation, like a strong wind, and not trying to do anything about it. An optimist is someone who has a positive outlook and thinks that things will eventually get better. So, in this case, the optimist is still hoping the wind will change and the situation will improve. A realist has a more practical approach and understands that sometimes it is impossible for the situation to improve. Instead of waiting for something to happen, the realist adjusts their approach and does something to try and make the most of the situation, like adjusting the sails of a boat to use the wind’s power rather than fight against it.