The song "A Simple Song" by Colin Hay is about the universal experiences of love, loss, growing older, and facing mortality. Colin speaks about the power of simple songs that everyone can sing along to. This is a metaphor for the simple joys and pleasures of life that we can all relate to. The song highlights the beauty and sweetness of falling in love, but also acknowledges that relationships can be complicated and messy. The chorus of the song reflects on the transience of life and how we should enjoy the simple moments while we still can. Colin sings about not wanting to die alone and the fear of facing mortality. However, he also acknowledges that it's not something to be preying on our minds and we should not dwell on it too much. Overall, the song reminds us to appreciate the simple things in life and to enjoy the journey while we can. It's a gentle reminder that we're here today and gone tomorrow, and that we should live every day to the fullest.