He had often had the experience of suddenly in a discussion grasping what it was his opponent liked and at once liking it too, and immediately he found himself agreeing, and then all arguments fell away as useless.

Sometimes, too, he had experienced the opposite, expressing at last what he liked himself, which he was devising arguments to defend, and, chancing to express it well and genuinely, he had found his opponent at once agreeing and ceasing to dispute his position.

He tried to say this.

She knitted her brow, trying to understand.

But directly he began to illustrate his meaning, she understood at once.