PD28

"The same understanding that made [us] confident regarding nothing terrible being eternal or even long-lasting, also sees that security regarding those same limited things is mostly attained by friendships."

Interpretation: Our spirit does not survive death and while alive we only require nature's finite list of necessary desires. The ability to maintain access to what satisfies this finite list is more secure while maintaining positive social relationships.

Cicero, De Finibus, 1.68: "eadem" inquit "Scientia confirmavit animum ne quod aut sempiternum aut diuturnumtimeret malum, quae perspexit in hoc ipso vitae spatio amicitiae praesidium esse firmissimum."

"it is the same Knowledge" [Epíkouros] says "that strengthened the mind so that it did not fear eternal or prolonged evil, which understood that within this very span of life, the support of friendship is the strongest."