In the old Testament Bible it grieved Samuel heart that King Saul was disobedient to God. Because Saul did not obey God, and even lied about it-which rendered it a "Sin". And so; God regret that he had made Saul a King.You see In the context that Saul committed the "Sin"; he did not follow God's Instructions. Which means he missed the mark. He did not do the things that God decreed him to do. God said, "It repenteth me" causing him to regret the favor Kingship bestowed upon Saul. (1 Sam 15:10-12)
In building the Kingdom of God. You shant not build a monument unto your self; but do it; in Honor of God.
Now, we all sin and fall short of the glory of God. We are just sinners but for his "Grace" we are saved. If you should sin, and we all do; its important not to hide it. Whatever, is done in darkness; will eventually come the the light. And if you think nobody will know, if you hide it from others-just remember God always know.
To love God is to obey him, his will, his ways, and his desires. The goal is; always obey what we know. We are creatures of habit. We don't always obey what we know. When we know better-we should better.When we don't there is consequences for our sins. In the end, obedience is more than sacrifice.
We need not think about doing any heavy physical things for God. What God wants: Is for us to to listen for his instructions and to obey them, in doing so; we obey him.
The results shall be: God revealing himself to us-for a deeper and better relationship with him