When people see human power revealed, they might be impressed. But the call of the gospel goes much too deep for anybody to be "impressed" into the kingdom. They have to be humbled, amazed, and awed at a power that comes from a completely different source, and only God's power, revealed in us, is up to the task.
God's power will liberate us from our weakness and equip us to do His will. It will also give us the strength to become like Christ.