忘却先于记得忘却由来已久
[wàng què xiān yú jì dé wàng què yóu lái yĭ jiŭ]
Translated roughly as 'Forgetfulness precedes memory, and forgetfulness has been long since established.' It implies a belief that forgetting happens faster than remembering or that there is a long-standing inclination toward choosing not to hold on to certain memories.