Rain, has the power to change things. Change events that you have planned. Then , can make a mood very interesting. Especially when you didn't see it happening.
That makes you admire the rain.
Lovers has walked in it. Lovers has made love within it. Or just walked in it for joy.
Which makes you admire the rain.
Men has cried within it. Some to hide their pain. Men has played within it. To enjoy personal pleasure.