Throughout this psalm, David has been describing the physical and mental anguish and sorrow and distress that is a result of sin.
The word, they, identifies, or rather makes ambiguous reference to enemies, that take advantage of the physical and mental handicaps and disadvantages that are caused by sin.
Not that this is a conspiracy theory, but this does describe the state of the individual, and ones exposure to all manner of opposition, because of the existence of sin, and-or the existence of the sin nature.
For the sin nature, which is ingrained in every individual’s body, combined with sin, which is a result of decisions of evil, produce a united enemy, which is overwhelming, and far beyond the ability of any individual to overcome.
Laying snares, is a concept of someone taking advantage of your weakened position, through fraud or deceit and setting traps of any and every kind, for the purpose of ruining you.
Seeking hurt, means quite simply, the intent to injure.
Speaking mischievous things, or speaking run, indicates slander or gossip or maligning, that are intended to ruin and injure and destroy their victim.
Imagining deceits, is the action of making false claims or accusations, that are clearly unfounded.
All day long, refers to the consistent and continual onslaught of these things against you, and never letting up throughout your entire life.
You only have two environments in which to live.
The first environment is that of sin, and the second environment is that of the spiritual life.
All of these descriptions come from the environment of sin, which has only one intent, and that is to destroy. Nothing good ever comes out of the environment of sin.
There are constant problems, constant difficulties, constant stresses, that will never ever go away, while you live in this world.
The environment of the spiritual life, is a far better environment, because it gives you the resources with which to deal with, and function, in this Devils world. While living in this world, you cannot escape the difficulties of this world, but you can have better resources that will help you get through those difficulties.
To choose to live in the environment of sin, means you are going into battle with no weapons, completely outnumbered, and was only one outcome, namely you lose. Physical and mental anguishes are a good symbolism of spiritual principles, helping us to learn and understand spiritual flaws, using physical ailments.
To choose to live in the environment of the spiritual life, which unfortunately most people do not do, means that you have the resources to live and function within this Devils world, and the guarantee from God, that you will have success, going into eternity.