The proud
zed (zade')
arrogant -- presumptuous, proud.
have forged
taphal (taw-fal')
to stick on as a patch; figuratively, to impute falsely -- forge(-r), sew up.
a lie
sheqer (sheh'-ker)
an untruth; by implication, a sham (often adverbial) -- without a cause, deceit(-ful), false(-hood, -ly), feignedly, liar, + lie, lying, vain (thing), wrongfully.
against me but I will keep
natsar (naw-tsar')
to guard, in a good sense (to protect, maintain, obey, etc.) or a bad one (to conceal, etc.)
thy precepts
piqquwd (pik-kood')
appointed, i.e. a mandate (of God; plural only, collectively, for the Law) -- commandment, precept, statute.
with my whole heart
leb (labe)
the heart; also used (figuratively) very widely for the feelings, the will and even the intellect
