David's Goliath win? Years of deliberate practice. Duckworth's Ch. 7 unpacks focused reps + feedback that forge skill; David's sling vs. lions, psalms for focus, and Nathan's truth mirror it. 5 biblical habits + modern elites show how to master your "sling."

Grit isn't hustle—it's lifelong stamina. Take Duckworth's 12-item Grit Scale test, discover passion hierarchies (Mankoff's 2,000 rejections, Disney's focus), and learn why legends like Edison/Paul (2 Tim 4:7) outlast talent through unwavering direction.

Talent blinds us to real success. Duckworth's Ch. 2 proves effort beats giftedness (Talent × Effort² = Achievement). Ditch distractions with military grit, biblical stewardship (Matt 25), and 3 practical steps to build perseverance in a noisy world.