日光不必暖有你就有光
[rì guāng bù bì nuăn yŏu nĭ jiù yŏu guāng]
'Sunlight need not be warm when you're there light will follow.' Expresses deep admiration toward an important presence where this person illuminates the life making even cold days feel bright and hopeful highlighting that the special one has become the main source bringing happiness/positive energy regardless other unfavorable surroundings.