过去过不去都要过去忘了忘不了都要忘了
[guò qù guò bù qù dōu yào guò qù wàng le wàng bù le dōu yào wàng le]
Both what must pass will always become the past and what you can never forget should also be forgotten, reflects an attitude of letting everything go, embracing whatever fate decides to throw at us.