一苦一乐相磨练，练极而成福者，其福始久。
人的一生，必然要经过苦、乐磨炼；在苦难中练就的幸福，才最为长久。
The poverty of our century is unlike that of any other. It is not, as poverty was before, the result of natural scarcity, but of a set of priorities imposed upon the rest of the world by the rich.
Every ton of coal we extract must create maximum value with minimum environmental impact.
The only limit to our realization of tomorrow will be our doubts of today.