"Our people must learn to devote themselves to doing what is good, in order that they may provide for daily necessities and not live unproductive lives."
Why should we do good rather than evil if in the end nothing we do is righteous to God and no sin can ever separate us from Christ crucified? As Paul writes in Titus, there are two very practical reasons among many others. First that we might provide for daily necessities and secondly not live unproductive lives.
We do good in order to bless others by providing for their basic needs and in return they bless us with gifts of humility and joy. In addition we receive blessings from God and store up for ourselves treasures in heaven. In so doing, we live productive lives because we are literally working for that which is eternal and does not rust or decay. Nothing we do in this life is productive because ultimately everything in this world passes away. How many ancients civilizations have there been with astounding technology lost forever to time? No doubt they thought they were being productive at the time, but in the end they are forgotten as if they had never been.
And it all starts with hearts and minds transformed by the Holy Spirit. So then we give ourselves over to Him so that we may be self-controlled, hospitable, upright, holy, and disciplined so that in every way we will make the teaching about God our Savior attractive.