The proof of the pudding is in the eating.

4723. The Proof of a Pudding is in the eating.

The cookbook gives a detailed description of ingredients and procedures but no proofs for its prescriptions or reasons for its recipes; the proof of the pudding is in the eating. … Mathematics cannot be tested in exactly the same manner as a pudding; if all sorts of reasoning are debarred, a course of calculus may easily become an incoherent inventory of indigestible information.

This is not about trust. This is about self-interest and verification of self-interest.
The proof of the pudding is in the eating. We're going to know shortly.

Vague as this is, it is a great advance on the popular demand for a perfect gentleman and a perfect lady. And, after all, no market demand in the world takes the form of exact technical specification of the article required. Excellent poultry and potatoes are produced to satisfy the demand of housewives who do not know the differences between a tuber and a chicken. They will tell you that the proof of the pudding is in the eating; and they are right. The proof of the Superman will be in the living; and we shall find out how to produce him by the old method of trial and error, and not by waiting for a completely convincing prescription of his ingredients.

For me, the proof is in the pudding. I think I have earned [the South African people’s] respect

Seeing is deceiving. It's eating that's believing.

The first bowl of chocolate pudding was too hot, but Goldilocks ate it all anyway because, hey, it's chocolate pudding, right?

See is deceiving. It's eating that's believing.

Taste the betrayal of the gods, then; I have dined on it for ages.

Taste begins when appetite is satisfied.

Lois looked edible, and you know it was tender all the way through, a kind of mystic combination of filet mignon and a Georgia peach aching for the tongue and ready to bleed gold.

To eat is to appropriate by destruction.

Eating is an agricultural act.