该句使用is结构进行定义说明，清晰表达梦想的内涵。
If a man knows not to which port he sails, no wind is favorable. — Seneca
The greatest distance in the world is not the distance between trees, but when branches from the same root cannot lean on each other in the wind.
Everyone has beautiful dreams; only through persistence can they be realized.
Where there is a dream, even hell becomes heaven.
Bravely accept challenges and continuously surpass yourself to unleash your infinite potential.
Do not compromise with fate or retreat from difficulties; that is how you become your own hero.
A dream is the firm belief in one's conviction, the desire to fulfill ideals, and the persistence to never give up. It is the greatest wealth of anyone who possesses it.
Sometimes, achieving a dream is happiness; sometimes, the shattering of a dream is also a form of happiness.
Those who strive to write their own dreams should be even more sober-minded.
To the strong, misfortune is like a plow that tills the soil of the heart; though painful, it allows for sowing.
Humans need material things to survive, but only with dreams do we truly live. Do you know the difference between survival and living? Animals survive, while humans live.
Being poor does not mean being penniless; it means having no dreams.
It is hard to say anything is impossible, because yesterday's dream can become today's hope, and tomorrow's reality.
Humanity also needs dreamers—those who are so devoted to the selfless development of a cause that they neglect their own material interests. — Marie Curie
It is terrifying for a person to be unable to find their distant shore. Having a pursuit gives life height, and once you have a pursuit, the distant shore is no longer far away.
如果一个人不知道他要驶向哪个码头，那么任何风都不会是顺风。——塞涅卡
世界上最远的距离不是树与树的距离，而是同根生长的树枝，却无法在风中相依。
每个人都有美好的梦想，唯有坚持，你的梦想才能实现。
有梦想的地方，即便是地狱也能变成天堂。
勇敢地接受挑战，不断地超越自我，如此才能释放无限潜能。
面对命运不妥协，面对困难不退缩，唯有如此，才能成为自己的英雄。
梦想是坚信自己的信念，是完成理想的欲望，是永不放弃的坚持，是每个人最伟大的财富。
有时，梦想实现是一种幸福；有时，梦想破灭也是一种幸福。
那些致力于书写梦想的人，往往更应保持清醒。
对强者而言，不幸犹如铁犁，开垦着内心的大地；虽有痛楚，却能播种希望。
物质维持生存，而梦想赋予生活。生存是动物的本能，而生活是人类的追求。
真正的贫穷并非身无分文，而是失去了梦想。
世间没有绝对的办不到，因为昨天的梦想可以成为今天的希望，进而成为明天的现实。
人类需要梦想家。他们全身心投入于事业的无私发展，而往往忽略了自己的物质利益。——居里夫人
一个人如果找不到远方是可怕的。有了追求，人生便有了高度；一旦有了追求，远方也就不再遥远。