Be ye also patient:
[Be ye also patient] As the farmer is. In due time, as he expects the return of the rain, so you may anticipate deliverance from your trials. –Barnes
[Be ye also patient]
Wait for God's deliverance, as ye wait for his bounty in providence.
–Clarke
Patient-`long-suffering.'
–JFB
Be patient-bear your afflictions without murmuring,
your injuries without revenge; and, though God should not in any signal
manner appear for you immediately, wait for him. The vision is for an
appointed time; at the end it will speak, and will not lie; therefore
wait for it. It is but a little while, and he that shall come will come,
and will not tarry. Let your patience be lengthened out to long
suffering;" so the word here used, makrothymesate, signifies. When we
have done our work, we have need of patience to stay for our reward.
This Christian patience is not a mere yielding to necessity, as the
moral patience taught by some philosophers was, but it is a humble
acquiescence in the wisdom and will of God, with an eye to a future
glorious recompense: Be patient to the coming of the Lord. And because
this is a lesson Christians must learn, though ever so hard or difficult
to the, it is repeated in v. 8, Be you also patient.
–Matthew Henry
Stablish your hearts:
[Stablish your hearts] Let your purposes and your faith be firm and unwavering. Do not become weary and fretful; but bear with constancy all that is laid upon you, until the time of your deliverance shall come. –Barnes
[Establish your hearts] Take courage; do not sink under your trials. –Clarke
"Establish your hearts-let your faith be firm, without wavering, your practice of what is good constant and continued, without tiring, and your resolutions for God and heaven fixed, in spite of all sufferings or temptations." The prosperity of the wicked and the affliction of the righteous have in all ages been a very great trial to the faith of the people of God. David tells us that his feet were almost gone, when he saw the prosperity of the wicked, Ps 73:2-3. Some of those Christians to whom James wrote might probably be in the same tottering condition; and therefore they are called upon to establish their hearts; faith and patience will establish the heart. –Matthew Henry