爱情似火轰轰烈烈爱情似水平淡无奇
[ài qíng sì huŏ hōng hōng liè liè ài qíng sì shuĭ píng dàn wú qí]
Love resembles fire, passionate and fierce; then also like water, serene and ordinary. It captures the essence of love as something capable of great intensity or simple everydayness.