A classmate wrote in his friend's graduation guest book, "The wind and waves are breaking through, and it goes straight from my Yun Fan to the deep, deep sea". What does he want to express?

One day, he will ride the wind and waves, break through difficulties and obstacles, cross the sea and realize his grand ideal. He wants to encourage his friends not to be discouraged, not to give up easily, to go forward and strive to realize their dreams!