不是有阳光就可以灿烂
[bù shì yŏu yáng guāng jiù kĕ yĭ càn làn]
Not Just Sunshine Can Create Splendor. This implies that just having good external conditions (sunshine representing all favorable circumstances) isn't enough; sometimes we also need to strive for or find internal strength (an internal 'sun') to truly shine and create a colorful brilliance.