WHY YOU SHOULD OBEY

The fifth book of Moses (Deuteronomy 28:1-14) makes us know that when we fully obey the Lord and keep all his commandments, He will set us above all nations and give us all these blessings; they are:
The Lord said when you obey Him, your towns and fields will be blessed, your children and your crops will be blessed. The offspring of your herds and flocks will be blessed, your fruit baskets and breadboards will be blessed. Wherever you go and whatever you do you will be blessed.
The Lord will conquer your enemies when they attack you. They will attack you from one direction but will scatter from you in seven! The Lord said he will guarantee a blessing on everything you do and will fill your store house with grain. The Lord will bless you in the land He is giving you.
The Lord said He will establish you as His holy people as He swore he would do when you obey Him and walk in His ways. The nations will see you are a people of the Lord and they will stand in awe of you. The Lord will give you prosperity in the land He swore to your ancestors to give you, blessing you with many children, numerous livestock and abundant crops. The Lord will send rain from His rich treasury in the heavens and will bless all the work you do. You will lend to many nations, but will never need to borrow from them.
If you listen to these commandments of the Lord and carefully obey them, the Lord will make you the head and never the tail, and you will always be at the top and never at the bottom. You must not turn away from any of the commands I am giving you today, nor follow after other gods and worship them.
All these blessings can only be obtained when we obey the Lord. So in order to have all these blessings make it a lifestyle to please the Lord so as to live happily.
Also note that there are curses for disobedience.
To obey is better than sacrifice and to heed is better than the fat if rams.
1 Samuel 15:22-24.