Stephen Guise opens by presenting his central thesis: extremely small, seemingly almost trivially easy habit commitments — like a single push-up daily — reliably overcome the motivation barriers that more ambitious habit goals typically encounter.

Why extremely small commitments prove so reliably effective:

• Ambitious habit goals, however well-intentioned, often trigger resistance and motivation failure precisely because of their perceived difficulty, while extremely small commitments feel genuinely almost effortless to begin
• Guise's approach deliberately embraces this extreme smallness as a feature rather than a limitation, providing reliable consistency that larger commitments often fail to sustain
• This opening establishes the book's foundational, somewhat counterintuitive thesis, motivating its subsequent detailed practical guidance

This opening establishes the book's foundational thesis regarding extremely small habit commitments reliably overcoming the motivation barriers larger, more ambitious goals typically encounter.