The first person is described as stable, fruitful in their life, strong, long-lasting. The second is described as blown about like the waste chaff on the threshing floor of a barn, and facing the judgement of God.
The key difference? The delighting in God's word - drawing strength from what God has to say in the bible, as a tree draws its strength from the depths of the water through its roots.
How do we draw on strength for life from God's word? We talked about reading, listening to it on mp3/apps, memorising, listening to music, reading it to each other, and meditating on it - really meditating on it. Turning a few verses over in your mind, looking at them in how they can be applied and drawing them out.
We could do a lot worse than start off by doing that with this psalm.
Here is Psalm 1:
Blessed is the one
who does not walk in step with the wicked
or stand in the way that sinners take
or sit in the company of mockers,
but whose delight is in the law of the Lord,
and who meditates on his law day and night.
That person is like a tree planted by streams of water,
which yields its fruit in season
and whose leaf does not wither--
whatever they do prospers.
Not so the wicked!
They are like chaff
that the wind blows away.
Therefore the wicked will not stand in the judgment,
nor sinners in the assembly of the righteous.
For the Lord watches over the way of the righteous,
but the way of the wicked leads to destruction.