And they have been succeeded by [new] generations who - [in spite of] having inherited the divine writ - clutch but at the fleeting good of this lower world and say, "We shall be forgiven,"135
the while they are ready, if another such fleeting good should come their way, to clutch at it [and sin again]. Have they not been solemnly pledged through the divine writ not to attribute unto God aught but what is true,136
and [have they not] read again and again all that is therein? Since the life in the hereafter is the better [of the two] for all who are conscious of God - will you not, then, use your reason?
I.e., for breaking God's commandments in their pursuit of worldly gain: an allusion to their persistent belief that they are "God's chosen people" and that, no matter what they do, His forgiveness and grace are assured to them by virtue of their being Abraham's descendants.
A reference to their erroneous idea that God's forgiveness could be obtained without sincere repentance. The divine writ mentioned twice in this passage is obviously the Bible.