Smooth sailing represents the animal is a horse, because the horse has the meaning of success, and it can also represent smooth sailing, so the two have the same meaning.
Horses have flexible brains, many ideas, and young people are keen. When people reach middle age, it will be smooth sailing. They dare to think and do, not afraid of failure, not afraid of challenges, especially brave and energetic. If they have any ideas, they will put them into practice and prove themselves with actions. They are definitely not people who talk but do not act. They are particularly passionate and enterprising in their work and can succeed.