想念是还没成熟的过去过去是还没长大的坚强
[xiăng niàn shì hái méi chéng shú de guò qù guò qù shì hái méi zhăng dà de jiān qiáng]
The act of thinking of someone reflects a relationship from the past, while growing stronger because of the distance. Nostalgia and the process of maturation are themes here.