The universe doesn’t care about your "purpose"

I’m certainly no Aristotelian. Not because I reject happiness. Rather, as a materialist, I think there’s nothing intrinsic about the goals and purposes we seek to achieve it. Modern science explicitly jettisons this sort of teleological thinking from our knowledge of the universe. From particle physics to cosmology, we see that the universe operates well without purpose.

The laws of physics are inherently mechanistic. The second law of thermodynamics, for instance, states that entropy is always increasing. Entropy is the degree of disorder in a system, for example our universe. Physical disorder is all about equilibrium — everything resting randomly and uniformly. Leave your hot coffee on the desk and it will cool to ambient temperature. The coffee molecules are more organized because they are moving faster and working harder to sustain a higher temperature than the surrounding air. But heat transfer results as the coffee molecules expend more energy. As energy is expended, the temperature of the coffee drops and equalizes with the air. Entropy increases since the molecules in the system are now less organized as the overall temperature becomes more uniform.