There is a test for knife sharpness that I run every time I pick one up: hold it at a gentle angle to the light and look along the edge. A sharp knife has no glint. A dull knife will show you exactly where it’s failed — small bright spots where the edge has folded or chipped, reflecting light back at you because the steel is no longer forming a true edge but a series of tiny flat surfaces.
Most knives in most kitchens fail this test entirely.
Why It Matters
A dull knife is not just frustrating — it’s dangerous. You compensate for lack of sharpness by pressing harder, and harder means less control, and less control means the knife goes where it wants rather than where you need it. The cuts you make on a sharp knife are guided by confidence. On a dull knife, everything is a negotiation.
Beyond safety, a sharp knife simply produces better food. A tomato cut with a dull knife is crushed and dragged before it’s sliced. The same tomato under a sharp blade is opened cleanly, with the cell walls intact, which means less juice lost and better texture on the plate.
The Options
There are three tools worth knowing about, in increasing order of commitment.
A honing steel doesn’t sharpen a knife — it realigns the edge. Use it before every session. Hold the steel vertically with the tip on a chopping board and sweep the knife down and across it, five or six strokes per side, at roughly twenty degrees to the steel. This maintains an edge but doesn’t restore one that’s genuinely dull.
A whetstone actually removes steel and grinds a new edge. This is what you need every few months, or when honing stops working. Start on the coarser side (1000 grit is a good all-rounder) and finish on the finer side. The angle matters: around fifteen to twenty degrees for Japanese-style knives, slightly more for Western ones. The technique takes ten minutes to learn adequately and a lifetime to do well. This is fine.
A pull-through sharpener is the fastest option and the least good. It removes metal aggressively and inconsistently. Use it if you have nothing else, but the results are noticeably inferior to even a modest whetstone.
What I Use
A cheap Japanese whetstone with 1000/3000 grit. It cost less than a decent chef’s knife and has kept my knives sharper than any of the alternatives I tried before it.
The ritual matters almost as much as the result. Sharpening a knife properly takes five concentrated minutes. In those five minutes the kitchen is quiet and you are paying close attention to a single edge. There are worse ways to begin an evening of cooking.