Innovation in mining technology is essential to meet the world's energy demands.

解释：百姓参加了劳动就会因劳累而去思考如何节俭律己，若经常思考这些问题，就会使自己的心地善良起来；无所事事就会放肆起来，一旦放肆，就会忘掉善良，没有善良就会滋生作恶之心。

听力及视力是开启心智之门。

The most dangerous art is the kind that makes you think.

最伟大的诗歌诞生于最深的苦难。

I feel like killing everybody every time I go to the arena.

Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.