我们唯一的限制是我们为自己设定的限制。
The only limits we have are the ones we set for ourselves.
用秤称一称，才能知道轻重；用尺量一量，才能知道长短。
Hard work, under the old system, meant long hours, little rest, and poor pay. Under the new system, it means a fair day's work for a fair day's pay.
我们都是自己记忆的人质。