While long-suffering is an attribute of Jehovah, it is always expressed in harmony with his primary attributes of love, justice, wisdom, and power. (1Jo 4:8; De 32:4; Pr 2:6; Ps 62:11; Isa 40:26, 29) Justice is due, first of all, to God’s own name. That name must be exalted above all others in the universe; and this is essential for the well-being of all his creatures. The magnifying of his name is one of his chief reasons for long-suffering, as the apostle Paul explains: “If, now, God, although having the will to demonstrate his wrath and to make his power known, tolerated with much long-suffering vessels of wrath made fit for destruction, in order that he might make known the riches of his glory upon vessels of mercy, which he prepared beforehand for glory, namely, us, whom he called not only from among Jews but also from among nations, what of it?” (Ro 9:22-24) God, in exercising long-suffering, is taking out a people for his name. And by means of them he is magnifying himself in all the earth.​—Ac 15:14; 1Co 3:9, 16, 17; 2Co 6:16.

Jehovah not long-suffering forever. On the other hand, God is long-suffering only as long as it is in harmony with justice, righteousness, and wisdom. The fact that long-suffering is exercised when a bad or provocative situation exists shows that it is meant to give opportunity for those involved in the bad situation to change, to straighten up. When matters come to a point where it is seen that there is no hope of such change, justice and righteousness would be violated if long-suffering should continue. Then God acts in wisdom to remove the bad situation. His patience comes to an end.

An example of this forbearance on God’s part and of its coming to an end is found in God’s dealing with men before the Flood. A deplorable condition existed, and God said: “My spirit shall not act toward man indefinitely in that he is also flesh. Accordingly his days shall amount to a hundred and twenty years.” (Ge 6:3) Later, regarding Israel’s misuse of Jehovah’s long-suffering, Isaiah said: “But they themselves rebelled and made his holy spirit feel hurt. He now was changed into an enemy of theirs; he himself warred against them.”​—Isa 63:10; compare Ac 7:51.

For these reasons Christians are entreated not to “accept the undeserved kindness of God and miss its purpose.” (2Co 6:1) They are counseled: “Do not be grieving [saddening] God’s holy spirit.” (Eph 4:30, Int) Also, “Do not put out the fire of the spirit.” (1Th 5:19) Otherwise they may continue to the point of sin and blasphemy against God’s spirit, in effect outraging it, in which case there is no repentance or forgiveness, only destruction.​—Mt 12:31, 32; Heb 6:4-6; 10:26-31.