The key to success is understanding and meeting the needs of others.
对性情上了解即是涵养，对每一念头注意提醒就是省察，气质的融汇就是克治。
The key to solving complex problems is to break them down into manageable pieces.
释义：他强调空气密度对于物质形态的决定性作用，认为物质的形态和性质都受到空气密度的影响。