Our heart
leb (labe)
the heart; also used (figuratively) very widely for the feelings, the will and even the intellect
is not turned
cuwg (soog)
to flinch, i.e. (by implication) to go back, literally (to retreat) or figuratively (to apostatize) -- backslider, drive, go back, turn (away, back).
back
'achowr (aw-khore')
the hinder part; hence (adverb) behind, backward; also (as facing north) the West -- after(-ward), back (part, -side, -ward), hereafter, (be-)hind(-er part), time to come, without.
neither have our steps
'ashur (aw-shoor')
a step -- going, step.
declined
natah (naw-taw')
to stretch or spread out; by implication, to bend away (including moral deflection); used in a great variety of application (out), stretch (forth, out), take (aside), turn (aside, away), wrest, cause to yield.
from thy way
'orach (o'-rakh)
a well-trodden road; also a caravan -- manner, path, race, rank, traveller, troop, (by-, high-)way.