Stock is everything in cooking, at least in French cooking. Without it, nothing can be done. If one's stock is good, what remains of the work is easy; if, on the other hand, it is bad or merely mediocre, it is quite hopeless to expect anything approaching a satisfactory result.
Auguste Escoffier
Experience, which plays such an important part in culinary work, is nowhere so necessary as in the preparation of sauces, for not only must the latter flatter the palate, but they must also very in savour, consistence, and viscosity, in accordance with the dishes they accompany.
Auguste Escoffier