使用了最高级形容词 difficult 和 closest 形成对比，强调了两者在时间或状态上的紧密关联。
The most difficult moments are often the closest to success.
Only those who possess true expertise, who understand their own strength and are skilled in using it appropriately and cautiously, can achieve real success in worldly affairs.
There are no difficult tasks in the world; only the two words "perseverance" and "endurance" are the keys to success.
Those who defeat others have strength; those who strengthen themselves achieve victory.
If a person lacks perseverance in doing things, he will not succeed in anything.
Only victory ensures survival, only success carries a price, and only hard work yields a harvest.
I succeeded because I had determination and never hesitated.
As long as you stand up one more time than you fall down, that is success.
The path to success lies in devoting yourself fully to your work without the desire for fame or reputation.
Aspirations should be firm rather than sharp; success comes from longevity rather than speed.
Victors often achieve success by persisting for the last five minutes.
Those who do not care whether others appreciate them will inevitably succeed.
No matter what the task is, as long as you have infinite passion for it, you will achieve success.
最困难的时刻，往往就是离成功最近的时刻。
只有具备真才实学，既了解自己的力量，又善于适当而谨慎地使用这种力量的人，才能在世俗事务中获得真正的成功。
天下无难事，惟坚忍二字，为成功之要诀。
胜人者有力，自强者胜。
一个人如果做事没有恒心，他是任何事也做不成功的。
只有胜利才能生存，只有成功才有代价，只有耕耘才有收获。
我成功是因为我有决心，从不踌躇。
只要站起来的次数比倒下去的次数多一次，那就是成功。
成功之道无他，惟悉力从事你的工作，而不消存沽名钓誉之心。
立志欲坚不欲锐，成功在久不在速。
胜利者往往是从坚持最后五分钟的时间中得来成功。
不在乎别人是否赏识他的人，必然成功。
无论何事，只要对它有无限的热情你就能取得成功。
"When you have the ability to fly, do not give up on flying."
"Maintaining your drive will eventually lead to success though the timing may vary"
"You may win, or you may fail, but you must never surrender."
"There may be times of physical and mental exhaustion but with perseverance you will endure"
"Only through perseverance can one achieve the extraordinary."