And all civilization rests upon language, and ideas constructed of language, and other such signs and symbols of the world as, say, mathematics and musical notation and so forth. But the important thing, I repeat, about this kind of chant is that it’s quite different from the ordinary religious exercise that, say, we have in our churches, where we are interminably talking and thinking, and we never get to contemplation. Other people have the theory that the real world is spiritual or mental. Finally, for a real challenge, try the Yale "Y1" keyway locks. Become comfortable with this before you try picking this lock with torque or you could bend or break your picks. There are many different styles of raking, some of which entail the use of special rake picks specifically designed for a particular technique. Very "wavy" rake picks can simulate various key profiles, and can be surprisingly successful at opening poorly-made locks. Lever locks employ a set of "lever" tumblers raised to a specific height by the key bitting.

Most pin tumbler cylinders can be "master keyed" to allow more than one key bitting to operate it. Some wafter lock cylinders (especially certain Chicago-brand locks) are double bitted, with some wafers making contact with the key at the top of the keyway and others at the bottom. Tubular cylinders typically have four to eight pin tumblers arranged in a circular pattern around the circumference of the plug. And, of course, electronic locks have at their root software whose size and complexity grows as they become more sophisticated (and as they are networked into centralized control systems). Inexpensive and low-power embedded micro-controllers are increasingly serving as the foundation of modern security and access control systems. Mechanical combination locks are common on inexpensive padlocks, safe locks, and to control access to high security vaults. Now the plug is being prevented from moving by the next most misaligned pin (which, in this case, is the other pin, since there are only two).

Congratulations, you've picked the (two pin) lock. A pin stack in a lock being picked might be in any of four states: Unset/not-binding. While pins are usually set by raising the cut from the plug to the shear line, they can also be picked by first oversetting the cut to within the shell and then lowering it to the shear line. Gradually ease up on the torque, allowing pins to drop one at a time. There is a limit to what one can consume. Because there are two independent shear lines, there is no way to control, or even tell, at which shear line a given pin stack sets. You are not separate from the external world. Electronic locks, of course, do not have mechanical tumblers and are so not vulnerable to many of the physical manipulations exploited in tradtional lock picking. The training locks in the lab are a good start, but you will probably learn more quickly if you have access to your own personal practice locks as well. And one does it not to be good for you, but just because you dig it.

But too much of a good thing, you see, can lead us to a confusion between symbols and what they represent. Picking locks very much involves "psychomotor" skill. The usual scheme for master keying involves using more than one cut in some or all pin stacks (this is accomplished by adding additional pin segments). The most common security pins are the "spool" and "mushroom" top pin designs, which are thinner in their mid-section. When the energy transfers, the top pin moves up while the bottom pin slows down, and a gap is created between the two pins. A correctly keyed wafer is flush with the plug on the top and the bottom and allows rotation. Now apply heavy torque, with the aim of pinching all the bottom pins at the shear line. As you progress, you should know the state of the lock at all times: which pins are set, which aren't, which one is binding. These locks are unusual in not requiring springs on the individual tumblers and are therefore especially well suited to outdoor use under extreme conditions. A few pin tumbler lock products orient the key horizontally in the keyway and use a flat key bitted with variable-depth holes ("dimples") rather than the cuts used for the familiar "sawtooth" key.

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