In the labyrinthine corridors of modern thought, the concept of "psychological hacking" emerges as a beacon, illuminating the intricate dance between the mind's vulnerabilities and the relentless pace of innovation. This philosophical musing seeks to explore the symbiotic relationship between the art of mental manipulation and the evolution of contemporary ideas, casting a discerning eye on how this interplay shapes our perception, behavior, and ultimately, the trajectory of human progress.

At its core, psychological hacking delves into the depths of the human psyche, leveraging understanding and exploitation of psychological principles to influence, guide, or alter an individual's thinking and behavior. It is a testament to the human intellect's capacity for adaptation and manipulation, mirroring the broader paradigm shifts in societal norms and values engendered by the advent of the digital age.

The nexus between psychological hacking and modernity in thought lies in the relentless quest for efficiency, personal optimization, and transcendence of traditional boundaries. In a world where information is both weapon and currency, the ability to navigate the cerebral landscape of oneself and others represents a form of intellectual avant-gardism, a stepping stone towards achieving a heightened state of awareness and influence.

This convergence also raises poignant questions about autonomy, authenticity, and the ethics of influence. As we venture further into the domain of cognitive enhancement and manipulation, the lines between self-improvement and coercion blur, challenging our preconceived notions of free will and consent. The democratization of psychological hacking tools, through the proliferation of technology and social media, amplifies these concerns, spotlighting the potential for misuse in the pursuit of power, control, or commercial gain.

Yet, despite its potential for ethical quandaries, psychological hacking also embodies the quintessence of human ingenuity and resilience. It underscores the adaptability of the human mind, pushing the boundaries of what is possible in personal development, communication, and societal evolution. In the hands of visionaries and ethical practitioners, it can catalyze profound transformations, fostering empathy, understanding, and connectivity on a global scale.

In the final analysis, the relationship between psychological hacking and the modernity of thought encapsulates the dual-edged sword of progress. It serves as a reminder of the inherent tension between the empowerment of the individual and the collective, urging a reevaluation of our values, methods, and the direction of our technological and philosophical endeavors. As we navigate this uncharted terrain, the balance we strike between harnessing the power of psychological hacking and safeguarding our intrinsic human dignity will shape the legacy of our era, for better or worse.