i.e. his good pleasure, the thought that delighted him. The order of the words gives the force of 'own,' or an emphatic 'my.' The connection of the beginning of the phrase with 'for salvation' is not very grammatical; but this abruptness of style is usual with Paul. See Note, ch. 9.3.
Some authorities have 'for Israel,' but 'for them' is the more correct reading, and, occupied as the apostle is with his subject, is far more beautiful. 'For salvation' is perhaps a little obscure; but what he says is, what would satisfy his heart was that; and his prayers tended that way, not to their judgment, evil as they were, and rejecters of Christ. But the judgment was not yet revealed.