An indicative is something that has already been indicated or declared about you as a fact (truth). On the other hand, an imperative is something we are commanded to do (direction). Every imperative in Scripture is based on an indicative. We are never asked to do something until we are told something true about who we already are.
The truths of the gospel support and sustain the commands of the gospel. If we do not first understand the truth about who we are, we will be crushed by the weight of the commands. Think about some of the commands we’re given in Scripture. The imperatives are always based on an indicative that is already true about us.
The author of The Truest Thing About You wrote... "You will flee sexual immorality—true, but not before you are reminded that your body is a temple of the Holy Spirit. Christ is in you. That’s who you are, so because of that, flee sexual immorality. Do nothing out of selfish ambition—true, but not before you are reminded that the mind of Christ, the ultimate humble servant, is in you. That’s who you are, so because of that, act in humility. You will forgive your enemies—true, but not before you are reminded that you have been forgiven. The death of Jesus has washed away every sin. That’s who you are, so because of that, forgive your enemies."