{By two immutable things} (dia duo pragmat(936e) ametathet(936e)).
See verse  17 . God's promise and God's oath, both unchangeable.
{In which it is impossible for God to lie} (en hois adunaton
pseusasthai theon). Put this "impossibility" by that in verses
 4-6 . {Theon} is accusative of general reference with
pseusasthai, first aorist middle infinitive of pseudomai.
{That we may have} (hina ech(936d)en). Purpose clause with hina
and the present active subjunctive of ech(935c), "that we may keep
on having." {Strong consolation} (ischuran parakl(8873)in). "Strong
encouragement" by those two immutable things. {Who have fled for
refuge} (hoi kataphugontes). Articular effective second aorist
active participle of katapheug(935c), old verb, in N.T. only here
and  Ac 14:6 . The word occurs for fleeing to the cities of
refuge ( De 4:42  19:5  Jos 20:9 ). {To lay hold of}
(krat(8873)ai). First aorist active (single act) infinitive of
krate(935c) in contrast with present tense in  4:14  (hold fast).
{Set before us} (prokeimen(8873)). Placed before us as the goal.
See this same participle used with the "joy" (charas) set
before Jesus ( 12:2 ).