在数学中,从困惑到清晰的旅程是最有价值的体验。
In mathematics, the journey from confusion to clarity is the most rewarding experience.
The past is not dead; it is not even past.
运气不好时金子可能变成铁,运气到来时铁也可能变成金。
The only person you are destined to become is the person you decide to be.