yesterday is history, tomorrow is mystery. today is a gift, so we call it present.出自?

桃李满天下,龟仙人桃树下教导熊宝宝,说了句著名的英语谚语：
Yesterday is a history,
tomorrow is a mystery,
but today is a gift,
that is why it is called Present.
这句谚语最早我是从一部叫《力克千年虫》的新加坡剧集中知道的,但稍微有些不同：
Yesterday is a history,
tomorrow is a mystery,
only today is a gift,
that's why we call it Present.
听说这句话来源于越南的释一行禅师,原话似乎是：
Yesterday was history,
Tomorrow will be a mystery,
Present is gift.