Psalms 1

1 How happy the man, who hath not walked in the counsel of the lawless, —and, in the way of sinners, hath not stood, and, in the seat of scoffers, hath not sat;

[God] is pleased with those who do not do what [MET] wicked people advise them to do, and who do not imitate the behavior of [MET] sinful people, and who do not join in with people who (ridicule/sneer at) [God].

2 But, in the law of Yahweh, is his delight, —and, in his law, doth he talk with himself day and night.

Those whom God is pleased with delight in doing the things that he has instructed/taught us to do. They read and think about Yahweh’s requirements, day and night.

3 So doth he become like a tree planted by streams of waters, —that yieldeth, its fruit, in its season, whose leaf, also doth not wither, and, whatsoever he doeth, prospereth.

They [constantly produce/do things that please God] just like fruit trees that have been planted along the banks of a stream produce fruit at the right time every year. [Like] trees that never wither, they succeed in everything that they do.

4 Not so, the lawless, —but as chaff which is driven about by the wind:

But wicked people are not like that! Wicked people are [as worthless as] chaff that is blown away by the wind.

5 For this cause, shall the lawless not stand in the judgment, —nor sinners in the assembly of the righteous.

Therefore, wicked people (will not be acquitted/will be condemned) [LIT] when [God] judges people, and furthermore, sinful people will not even be present when [God] gathers righteous people together,

6 For Yahweh doth acknowledge the way of the righteous; but, the way of the lawless, shall vanish.

because he guides and protects righteous people, but the path that the wicked walk on leads them to where they will be destroyed/punished [by God forever].