Robert Shaw
" A covenant is generally defined to be an agreement between two parties, on
certain terms. In every covenant there must be two parties, and consequently
two parts"”a conditionary and a promissory; the one to be performed by the
one party, and the other to be fulfilled by the other party. If either of the
parties be fallible, a penalty is often added; but this is not essential to a
covenant."
"In the authorised English version of the New Testament, the covenant of
grace is frequently designated a testament; and it is generally admitted, that
the original word signifies both a covenant and a testament. There is, at least,
one passage in which it is most properly rendered testament, namely, Heb. ix.
16, 17. Some learned critics, indeed, have strenuously contended against the
use of that term even in this passage; but the great majority allow that the
common translation is unexceptionable."