Temptation as cause for joy.
What a reversal of the ordinary view, which regards trial and temptation as an unwelcome visitation! Prosperity is the blessing of the old covenant, adversity is the blessing of the new. Temptations should be regarded, not only as probations, i.e. as testing what we are, but as designed also for moral discipline and improvement. The character that has never been tried may be innocent, but it is liable to be crushed. It is lacking in the strength and vigor, which come from the formed habit of resistance, and therefore temptation may be the means of strengthening him who is subjected to it. It thus becomes an opportunity, and as such should be welcomed with joy. It produces patience, that "queen of virtues," which bears up under the heaviest weight, and purifies and ennobles the whole character. Patience must next be allowed her "perfect work;" for the Christian can never consider himself τέλειος till he has come "to the perfect man, to the measure of the stature of the fullness of Christ."
"Sweet are the uses of adversity,
Which, like the toad, ugly and venomous,
Wears yet a precious jewel in his head."
(Shakespeare)
(On temptation regarded as an opportunity, see Mozley's 'Parochial Sermons,' Sermon 2)