Matthew 19:8

Suffered; he did not direct it, or suffer it in any such sense as to imply that God approved of it, or that it was right. It was a civil regulation of a civil government, suffered for a time on account of the wickedness of men, and in order to prevent the greater evils which that wickedness would otherwise have occasioned. It was a regulation as to the mode of putting away; not to justify that wrong practice, but to lessen, in some measure, its evils.

Not so; from the beginning, and in all its stages, this putting away "for every cause" of one's wife was a violation of the will of God, as manifested in his works and his word. That God suffers the adoption, and for a time the continuance of practices, on account of the hardness of men's hearts, is no evidence of the moral rectitude of those practices. Nor is the giving of directions about them, and the adoption of regulations to lessen their evils while they continue, any evidence that God approves of them. The practices may still be a violation of what has been the will of God from the beginning, and obedience to him may require them to be done away.