天蓝不及海深爱我不及爱你
[tiān lán bù jí hăi shēn ài wŏ bù jí ài nĭ]
The sky's blueness can't compare to the sea's depth; my love for me doesn't measure up to my love for you. This expresses an admiration for the immensity and profundity of loving another deeply and intensely compared to anything else, including oneself.