James 1:4

Let patience have her perfect work. — Do not think the grace will come to its full beauty in an hour. Emotion and sentiment may have their place in the beginning of a Christian career, but the end thereof is not yet. Until the soul be quite unmoved by any attack of Satan, the work cannot be deemed “perfect.” The doctrine is not mere quietism, much less one of apathy, but rather this, that the conscious strength of patient trust in God is able to say at all times (comp. Psalms 63:8) —

“My soul hath followed hard on Thee;
Thy right hand hath upholden me.”

And if in this patience we can learn to possess our souls (Luke 21:19) the perfect work of God will be wrought within us.

That ye may be perfect and entire (or, complete). — A special proof herein for religious people may be taken with regard to temper. Few trials are harder; and sweetness of disposition often melts away from physical causes, such as ill-health or fatigue. But the great test remains; and it is one which the world will ever apply with scorn to the nominally Christian, refusing to admit the claims of saintliness on the part of any whose religion is not of the household as well as the Church. The entirety and completeness of the life hidden with Christ in God (Colossians 3:3) are manifested most by self-restraint.

Wanting nothing. — The older version, “lacking,” found in Tyndale, Cranmer, and the Genevan Bible seems decidedly better. Here is no wish that the faithful should be free from care, heeding nothing; but rather that their whole lives might be without fault or flaw: a perfect sacrifice, as it were, offered up to God. And this idea is confirmed by reflecting on the original meaning of the word translated “entire” above in the Authorised version=complete, i.e., as an offering, with no blemish.