It is easier to fast than diet

--- Nassim Nicholas Taleb, The Bed of Procrustes: Philosophical and Practical Aphorisms (2010), in the section "The Sacred and the Profane"

In context:

One categorical: it is easier to fast than diet. You cannot be "slightly" kosher or halal by only eating a small portion of ham.

The "slightly kosher" coda actually detracts from the aphorism; it's just a vanilla oxymoron, like "partly pregnant."