盖棺论定 Call no man happy before he is dead.
老吾老以及人之老,幼吾幼以及人之幼 Charity begins at home.
以牙还牙,以眼还眼 Claw me and I'll claw thee.
平生不做亏心事,半夜敲门心不惊 Clear conscience never fears midnight knocking.
挂羊头卖狗肉 Cry out wine and sell vinegar.
害人反害己 Curses come home to roost.