The road to Damascus
Definition 1 of 1
Pro Tip 1/3Biblical Origin
Understand that 'the road to Damascus' refers to Saul's transformative vision in the Bible, becoming Paul the Apostle. 
Her attitude towards recycling changed overnight; it was truly a 'road to Damascus' experience.
Pro Tip 2/3Not Literal
Remember, the phrase is metaphorical, not describing an actual journey, but a moment of sudden insight or change. 
Leaving the corporation was his 'road to Damascus' moment toward starting a nonprofit.
Pro Tip 3/3Profound Change
Use it to denote a deep, often personal transformation, not just a minor change of opinion. 
After volunteering abroad, his 'road to Damascus' experience turned him into a lifelong philanthropist.