许冠杰的歌曲《A Spaceman Came Travelling》讲述了一个来自遥远星球的太空人，他的飞船穿越了光年的距离，来到地球的一个村庄上空。这首歌通过太空人的视角，传达了和平、善意和对儿童的爱的信息。

歌词中描述了太空人降落在一个棚屋，那里有一对母子躺在床上。太空人头顶环绕着银色的光环，面带天使般的面容，让母子俩感到害怕。但太空人告诉他们不要害怕，他来自一个遥远的星球，带来了一个信息给人类。

随着太空人的话语，空气中突然充满了最甜美的音乐，歌词中反复出现的“La la la la la la la la”旋律，象征着和平与善意的信息。这首歌的旋律和歌词，传递了一种超越时间和空间的普遍情感，即对人类和平与爱的渴望。

太空人在黎明前离开，告诉人们当他离开后两千年，这首歌将再次响起，伴随着一个婴儿的哭泣。这暗示了这首歌的信息和旋律将跨越时间，持续影响着人类。

整首歌曲通过太空人的旅行和信息传递，探讨了人类共同的价值观和情感，以及音乐和爱的力量。

A spaceman came travelling on his ship from afar

'Twas light years of time since his mission did start

And over a village he halted his craft

And it hung in the sky like a star just like a star

He followed a light and came down to a shed

Where a mother and child were lying there on a bed

A bright light of silver shone round his head

And he had the face of an angel and they were afraid

Then the stranger spoke he said do not fear

I come from a planet a long way from here

And I bring a message for mankind to hear

And suddenly the sweetest music filled the air

La la la la la la la la

La la la la la la la

La la la la la la la la

Peace and goodwill to all men and love for the child

La la la la la la la la

La la la la la la la

La la la la la la la la

This lovely music went trembling through the ground

And many were wakened on hearing that sound

And travellers on the road the village they found

By the light of that ship in the sky which shone all round

And just before dawn at the paling of the sky

The stranger returned and said now I must fly

When two thousand years of your time has gone by

This song will begin once again to a baby's cry

La la la la la la la la

La la la la la la la

La la la la la la la la

Peace and goodwill to all men and love for the child

Oh whole world just waiting

La la la la la la la la

La la la la la la la

La la la la la la la la

Peace and goodwill to all men and love for the child

La la la la la la la la

La la la la la la la

La la la la la la la la