When I used to watch Dr Who as a child, the daleks were my favourite 'monster'. They scared me with their horrible metallic voices, threatening to "exterminate!" and this display also included sound effects, adding to the atmosphere.
God works in all things – not just isolated incidents – for our good. That doesn’t mean that everything that happens to us is good. There’s a lot of evil in our fallen world but God is able to turn every circumstance around for us for our long-term good. God isn’t necessarily working to make us happy, but to fulfil His own purposes.
Those who are ‘called’ are those the Holy Spirit convinces and enables to receive Christ. They can then trust in God, not life’s treasures; they look for their security in heaven, not in this world.