This illustration is of a tiger gazing up at the stars of a universe much larger than itself. It is that hopeful curiosity we all have, wanting a life that fulfills our dreams and love for a larger life.
Lady Macbeth is more ambitious than Macbeth is. They are both thirsty for power and will stop at nothing to get it. Macbeth is much more anxious over what the future will bring for their actions compared to Lady Macbeth.