Sow the wind and reap the whirlwind.

Hosea 8:1-7
But Israel has rejected what is good; an enemy will pursue him.
They set up kings without my consent; they choose princes without my approval; with their silver and gold they make idols for themselves to their own destruction.
They sow the wind and reap the whirlwind. The stalk has no head; it will produce no flour. Were it to yield grain, foreigners would swallow it up.
Israel will be caught up in the whirlwind of God's judgment. They have made gods, made up laws, set up kings to suit them,
Bull-calf: Israel's first king set up two images at shrines in his own land to rival Jerusalem as religious centers. The calf had a  long association with pagan cults in Egypt and in Canaan.
Why?
Israel did anything without  God's consent, do their own mind and idea. There was no God, so the destruction will their own consequence.
What we sow, then what we reap! Israel mixed the secular into their life or their holy, then it will bring the fall.
Back to the beginning, when it was wrong at the beginning. The basic of Christian is the heart to the Lord. We are his people, his slaves. Follow his way and his word.
How?
Careful obey the word of God and do the mission to the Lord with all my heart, my mind and my strength with humble.