雅思口语P2 Describe a sentence or few words that you remember from a poem or song(文字版）

The sentence that I remember well is originally from a poem, it is about dream big then work hard. Quite simple sentence but really impressive to me. Let me put it in this way a little bit, if you want to make your come true, or to have material success, you have to sacrifice something of freedom to get it. Gotta be honest, I couldn't remember the poem clearly, but these few words have been with me for years. A couple of years ago, when I was in the first year of my college life, I was very lazy in everything. Ranging from my academic study to after-class activity, from my personal life to my part time job. The other day, I came across this sentence when I was sitting in my dormitory. A roommate of mine recommended his favorite poem to me, which says that dream big work hard. At that very moment I realized the importance of sacrifice. Then I had to keep doing it for a while. Till now, I still have it in my mind, especially when I am suffering from bad emotions or working pressure. It works well, apparently. That is it.