Or are they convinced, perhaps, that a "man of the faith" strategy will prove sufficient?

"Should your obedience and learning prove sufficient, you may be rewarded."

It proved quick and more than sufficient even in high altitudes.

However, foreign policy did not prove sufficient to divert attention from domestic problems.

But this did not prove sufficient to get Europe out of its conundrum.

Because they believe that their combined armies will prove sufficient.

He said that gathering 50,000 could prove sufficient to inspire more people to mass.

Further reductions might prove sufficient to disrupt their plans completely.

Yet none of this has proved sufficient to protect them.

"However, if I speak to her myself, and to your sons, then that may prove sufficient."