It is difficult to say what is impossible, for the dream of yesterday is the hope of today and the reality of tomorrow.

It is difficult to say what is impossible, for the dream of yesterday is the hope of today and the reality of tomorrow.

很难说什么是不可能的，因为昨天的梦想是今天的希望，明天的现实。

-- Robert Harold Schuller 罗伯特·哈罗德·舒勒