唯一比思想的力量更偉大的是心靈的勇氣。
The only thing greater than the power of the mind is the courage of the heart.
The strongest principle of growth lies in human choice.
Honor is like an island, rugged and without a beach; once we have left it, we can never return.
The past is always changing, because we are always changing our relationship to it.
Cooperation is more important than competition, and ecosystems are more viable than going it alone.