Thus safely low, my Friend, thou canst not fall
Stoic philosophy claim
Thomson is arguing that staying 'low'—humble, without ambition—guarantees safety. This is a deliberate reversal of Renaissance ambition literature. He's selling restraint as a security strategy.
Passion as danger
Notice 'tender are the most severe'—Thomson paradoxically claims that soft emotions cause the most damage. This contradicts Romantic ideology (which was emerging in his lifetime) that celebrated feeling.
Two-tier afterlife
The final couplet introduces a hierarchy: virtuous peace is available now, but 'high bliss' requires 'a higher state.' Thomson is distinguishing between earthly contentment and heavenly reward—a Christian framework masquerading as philosophy.