Matthew 22:37-40 (NKJV)
Jesus said to him, 'You shall love the Lord your God with all your heart, with all your soul, and with all your mind.' This is the first and great commandment. And the second is like it: 'You shall love your neighbor as yourself.' On these two commandments hang all the Law and the Prophets."
An expert in the law had asked Jesus, of all the laws (the Pharisees had lots of them), which was the greatest. I love the way Jesus answered. Instead of showing him which one command was the most important, he gave him two commandments and then pointed out that if you get these two right, you don't even have to worry about the rest of them. They had become so bogged down with keeping the most minute detail of the law (legalism) that they had forgotten the whole point of it all.
The apostle Paul simplified his life too: he said "this one thing I do ..."
Philippians 3:13-14 (NKJV)
Brethren, I do not count myself to have apprehended; but one thing I do, forgetting those things which are behind and reaching forward to those things which are ahead, I press toward the goal for the prize of the upward call of God in Christ Jesus.
There are lots of lists in the Bible that help to simplify our thinking about God.
Micah 6:8 (NKJV)
He has shown you, O man, what is good; And what does the Lord require of you But to do justly, To love mercy, And to walk humbly with your God?