For this very reason, adding your diligence [to the divine promises], employ every effort in exercising your faith to develop virtue (excellence, resolution, Christian energy),…(2 Peter 1:5a AMP)
Jesus did say that if we had faith the size of a mustard seed, we could move mountains (Matt 17:20). Somehow though, when we do exercise faith as believers, even if it is faith the size of a boulder, we tend to apply it to moving molehills.
Most of our exercises in faith tends to be directed at moving the molehills of poverty and ‘witches’ while we generally almost completely ignore the mountain ranges of personal character flaws. We expend a sizable amount of faith and a great deal of time time calling forth money, when the bible says to us that if we simply seek righteousness, peace and joy in the Holy Ghost (the kingdom), money and all it can buy will be chasing us.
In chasing prosperity, believers act contrary to the word of God and cut the pitiable sight of a dog chasing its own tail: condemned to run endlessly in circles.
Apostle Peter offers us freedom from this misappropriation of our faith: he directs us to a more effective use of our faith. His admonition is that we diligently apply our faith to developing virtue. Sounds like he is saying to us that all that loud praying we do to call forth money from all the corners of the earth as we remind God about our share of the cattle on a thousand hills which often leaves us drenched in sweat should actually be put to a different purpose. He wants the faith we bring to prayer to focus more on seeking the grace we need to overcome personal character flaws and develop virtue.
Sin not poverty is the real mountain in our lives that we need to command to be removed and cast into the sea. If we apply diligence and faith to deal with the mountain of sin, those other molehills of poverty etc. will naturally vanish.