The answer is: Psalms

Ps 1:1

The first line of Psalms kicks off what many consider a grand introduction to the entire book. The word "blessed" right away brings a sense of joy and prosperity. It sets the tone for not only the Psalm but also the journey of individual and community life in pursuing virtue. This moment isn't just about language; it goes deeper into what it means to be part of a moral community.

Psalms is not only poetic; it was composed over many centuries, with contributions from various authors, including David and Solomon. Imagine a collection of songs woven together from different periods, reflecting a tapestry of ancient Israel's life, joys, and struggles. The Psalms include expressions of hope, lamentation, and even celebration — "Blessed is the man" serves as a grounding reminder amid life's twists. It's also worth noting that the Hebrew word for "blessed" (אֶשֶּׁר - *esher*) implies a state of happiness that's fulfilled by right living and influence.

Interestingly, this famous verse hasn’t just filtered through religious traditions; it refrains with people across various walks of life, being cited in literature, artwork, and music throughout history. Ultimately, it beckons the reflection on how we live and who we surround ourselves with: the essence of good counsel and living a fulfilled life!