Persistence in prayer brings results that casual prayer does not.
Religious truth is not false for being narrow any more than mathematical or scientific truth is false for the same reason.
Believers are inclined to attribute their spiritual successes to their godliness when it would be more accurate to connect them with God's faithfulness.
Spiritual leadership ought to be given to those who have proven themselves under stress.
God's love does not depend on the current spiritual condition of those He loves.
In Deuteronomy 11, God offers Israel a choice; either a life of productivity and enjoyment made possible by obedience to Him, or a life of difficulty and opposition made necessary by disobedience. The happiness Israel desires can only be theirs by being properly related to Him.