or lest he should say, If God had but guided me, I would surely have been among those who are conscious of Him!"-

"Or (lest) it should say: 'If only God had guided me, I should certainly have been among the righteous!'-

Or should say: If Allah had but guided me I should have been among the dutiful!

Or it should say: Had Allah guided me, I should have been dutiful;

Or [lest] it say, "If only Allah had guided me, I would have been among the righteous."