He gestured to one of the chairs. "It’s better if you sit down. This will be your first time, so it might be difficult to stay on your feet once I start working." She did as he asked. He continued, "As you know, Legilimency is an art of invading one’s mind, of shuffling through one’s thoughts and memories to extract what’s needed. One way to block a Legilimens attack is with Occlumency – a quite obscure skill which helps to clear one’s mind from all and any thought." He circled around her chair like a hawk, once, twice. "This is how it’s going to work – I will use Legilimency on you to invade your mind and you will try to block me and eject me from your thoughts. Understood?"