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我不相信后悔。一切都有原因。

如果謀慮不到，那么就根據過去推知未來（主要強調憑借經驗），根據明顯的事推知隱微的事。像這樣謀慮，那么所謀必得（成功）。

"The greatest glory in living lies not in never falling, but in rising every time we fall."

We come nearest to the great when we are great in humility.

The development of the drone industry is ultimately to serve humans, not to replace them.