And let us not be weary in well doing: for in due season we shall reap, if we faint not. And - Greek, 'But.' It is "life everlasting" to sow unto the Spirit; BUT it must be a continuous sowing-we must not "weary" (2 Thessalonians 3:13).
In due season - in its proper season, God's own time (1 Timothy 6:15).
If we faint not, х mee (G3361) ekluomenoi (G1590)] - 'be not relaxed.' Weary [ekkakoomen, C, 'let us not go OUT OF duty's path through fear.' But 'Aleph (') A B Delta, engkakoomen (G1573), 'let us not lose heart IN it'] refers to the will; faint, to relaxation of the power (Bengel).