Despite our growing ability to manipulate the physical world, including even the fabric of spacetime in ways previously unimaginable, the unidirectional flow of time remains stubbornly beyond our control. While we can measure time with exquisite precision and account for its relativistic effects, we cannot reverse it, accelerate it, or isolate it from the unfolding of events. This inherent uncontrollability of time presents a fundamental limit to our understanding of the universe. The persistent linearity of cause and effect, bound by time's arrow, serves as a stark reminder of this ultimate constraint.