Blessed is the man that walks not in the counsel of the ungodly, nor stands in the way of sinners…
To make my meaning clearer, suppose a person steps out of pure air into a rather close room: the air is at first disagreeable and oppressive, he does not breathe freely, but in a little while he gets more used to it, and after a while he hardly is aware that the room is close, and that he is breathing impure air. Suppose also that then he goes into another room, which is much closer, the air of it much more impure: it will not seem to him, coming as he does from the first room, to be worse than the first room seemed when he came from the pure air. This just describes the way in which the man who is beginning to walk in the counsel of the ungodly, allowing himself to be influenced by them, soon learns to breathe at ease in an ungodly atmosphere. Probably his conscience is uneasy as he steps from his place of safety, but he soon accustoms himself to his new position, and then he is ready for the next step, and there is every prospect of his taking it.
Parallel VersesKJV: Blessed is the man that walketh not in the counsel of the ungodly, nor standeth in the way of sinners, nor sitteth in the seat of the scornful.