Verses 1–51
if thou shalt hearken
Chapters 28.-29. are, properly, an integral part of the Palestinian covenant, Deuteronomy 30:1-9. (See Scofield "Deuteronomy 30:3").
Verses 52–57
trustedst
(See Scofield "Psalms 2:12").
Verses 58–68
fear
(See Scofield "Psalms 19:9").