This is why you can not be a christian and be casual about it. Your enemy will attack you at every opportunity He gets. That’s why you need the backing of heaven. It’s like when a police officer puts on his uniform and badge, he can whistle and put up a sign to stop a huge tanker truck on a busy day, and the driver of the truck will have to stop.
The driver doesn’t stop because of the police officer as a person, but because of the uniform and badge he wears which represents the authority backing him; the authority of the state government. That’s why you need the authority of heaven, backing you.
No wonder the scripture tells you to “Put on the whole armor of God, that you may be able to stand against the wiles of the devil. For we do not wrestle against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this age, against spiritual hosts of wickedness in the heavenly places.” Ephesians 6:11-12
When you’ve decided to follow Jesus, you have to follow Him FULL-TIME! You have to be as a soldier prepared for battle. Just like that police officer has to be under authority, and obedient to the laws of the state himself, in order to have access to the uniform and badge, and the backing of the authority; you too have to be in obedience under God’s authority.
You have to learn His ways and only do those. Just how we become closer to the people we spend the most time with, we can learn God’s ways, and how he wants us to live by spending more time with Him praying and studying His word.