One day he looked up and saw a magnificent bird high above in the cloudless sky.

某一天，它向天空望去，在万里无云的高空，它看见有一只非一般的鸟。

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But he who will fly, as an eagle does, into the higher levels where cloudless day abides, and live in the sunshine of God, must be content to live a comparatively lonely life.

但是我们如果像鹫鹰那样飞上高天，直穿云霄，我们就能与上帝同居；虽然地上的生活孤独一点，也可以叫我们知足了。

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But a clear, cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more easily than they do red light.

BBC: rainbow