原谅我痴心妄想原谅我强颜欢笑
[yuán liàng wŏ chī xīn wàng xiăng yuán liàng wŏ qiáng yán huān xiào]
Asking for forgiveness both for being obsessively idealistic ('obsessively daydream') and for forcing smiles. It hints at someone facing reality with unattainable fantasies and inner sadness despite putting on a cheerful appearance externally.