Begins with "blessed" and ends with "perish"

Prosperity of the Godly
Ps 1:1 Separate from the World
Ps 1:2 Saturated with the Word
Ps 1:3 Situated by the Water (Holy Spirit)

Perishing of the Ungodly
Ps 1:4 No rest in the present
Ps 1:5 No righteousness in the future
Ps 1:6 No reward in perpetuity

verse 1, 2, 3 - discernment, delight, dependence
verse 4, 5, 6 - castaway, condemned, consumed