The answer is: Twice a week

Luke 18:9-14

In the intriguing parable of the Pharisee and the tax collector found in Luke 18:9-14, we get a glimpse into the contrasting spiritual postures of these two men. The Pharisee, zealous in his practice, fasts twice a week, showcasing his extreme commitment to piety. Fasting in ancient Judaism was typically practiced once a year during Yom Kippur; his twice-weekly fast stands out! Interestingly, it reflects a dedication that likely would have impressed many during Jesus' time.

On the flip side, we have the tax collector, often viewed as a social outcast due to his dishonest practices. However, his humble cry for mercy reveals a genuine heart yearning for redemption. It's a breathtaking moment where we see validation doesn’t come merely through ritual observance, like the Pharisee’s boastful practices, but through sincerity and humility of heart.

The fact that the Pharisee’s confidence in his self-righteousness ultimately leads to being “humbled” serves as a poignant reminder about the values that underpin true spiritual life. In essence, the parable teaches us about inner disposition versus outward observance—qualities that resonate throughout various biblical narratives.

This story also echoes back to other biblical lessons where God favors the humble, like David the shepherd boy, over outwardly 'perfect' people. It's a knowing smile from Scripture that sometimes, less can be more, and in recognizing our imperfections, we may find the most profound connection with the Divine.