"it is using the rain as a metaphor for a problem- obviously- it is saying that when faced with a challenge some people walk in the rain- face up to the challenge- others just let it depress them or a defeated by it- get wet"
意思是面对同样的问题(困难)有些人勇敢的去面对,而有些人甚麼都不做.在中文里好像有句话是:要是不战胜困难,就会被困难战胜.