We know what the First Commandment is: "I am the Lord thy God: thou shalt have no other gods before me".
So practically speaking, it means that we believe and worship God alone, and we serve Him and no other.
But of course, that is easier said than done. Because every sin and wrong doing is essentially a breaking of that First Commandment.
And even when it comes to priorities, do we put God first above everything else, including our own personal priorities?
In the 1st reading, the people who came back from exile were supposed to get started with the rebuilding of the Temple.
But because they had their own needs and priorities, the building of the Temple hardly got started, as the materials were used to build the peoples' homes first, and they were getting comfortable and slowly forgetting about the rebuilding of the Temple.
So the prophet Haggai addressed the people with this: Reflect carefully how things have gone for you. You have sown much and harvested little; you eat but never have enough; drink but never have your fill; put on clothes but do not feel warm.
Yes, that same message is also for us: Reflect carefully how things have gone for you.
When we say that we believe in God and serve Him alone, then God is the top priority over and above our needs and priorities.
Let us do what God wants of us and He will provide for our needs. When we do God's will, God will also take care of us.