Lightnin' (1925). John Ford

Never stand under a hangin' lamp, Zeb. They're like females – uncertain.

But woman's curiosity...

– Miss Jones, you know that Mr. Jones loved his wife – loved her devotedly, don't you?

– How can she know that?

– If it please your Honor, that is something that a woman does know. She may believe a man to be a contemptible liar – she may say she'll despise him always, always, always – but down in her heart, if he really loves her, she knows it. If she is his ideal – his hope, his all – if he would willingly lay down his life for her, she can't help knowing it – and no matter what she says about him, or thinks about him, the knowledge that he cares more for her than for all else in the universe...