| 1. | Existing I peer and penetrate still. - from Leaves of Grass by Walt Whitman |
| 2. | She soon believed herself to penetrate Mrs. - from Emma by Jane Austen |
| 3. | The obscurity was so difficult to penetrate that Mr. - from A Tale of Two Cities by Charles Dickens |
| 4. | Your dreams O years, how they penetrate through me I know no. - from Leaves of Grass by Walt Whitman |
| 5. | I will penetrate what it is in them that is sarcastic upon me. - from Leaves of Grass by Walt Whitman |
| 6. | To penetrate the inmost lore of poets--to know the mighty ones. - from Leaves of Grass by Walt Whitman |
| 7. | Did we count great, O soul, to penetrate the themes of mighty books. - from Leaves of Grass by Walt Whitman |
| 8. | What cities the light or warmth penetrates I penetrate those cities myself. - from Leaves of Grass by Walt Whitman |
| 9. | Still I would penetrate their misty veil and seek them in their cloudy retreats. - from Frankenstein by Mary Wollstonecraft (Godwin) Shelley |
| 10. | We penetrated deeper and deeper into the heart of darkness. - from Heart of Darkness by Joseph Conrad |
| 11. | Woe to him who penetrates thithe. - from Les Miserables by Victor Hugo |
| 12. | He penetrated to Cosette's bedroom. - from Les Miserables by Victor Hugo |
| 13. | The farther I penetrated into London, the profounder grew the stillness. - from The War of the Worlds by H. G. Wells |
| 14. | That evening he and Albert once more penetrated the grounds of Astley Priors. - from The Secret Adversary by Agatha Christie |
| 15. | But here were books, and here were men who had penetrated deeper and knew more. - from Frankenstein by Mary Wollstonecraft (Godwin) Shelley |
| 16. | The closer you penetrated to the substance of his mind, the sounder it appeared. - from The Scarlet Letter by Nathaniel Hawthorne |
| 17. | A little light penetrates towards mid-day. - from Les Miserables by Victor Hugo |
| 18. | The cause of death was a deep stab in the left side, which must have penetrated the heart. - from A Study In Scarlet by Arthur Conan Doyle |