on high idiom
literary在天上
in heaven
God looked down from on high. 上帝在天上看着我们。
mainly humorous（命令）由上级下达的，来自高层的
If an order comes from on high, it comes from someone in a position of authority.
Instructions came from on high to reduce our travel expenses. 上级指示要缩减我们的差旅费用。