Jesus put it simply~

Matthew 23:

³⁷ Jesus replied, “‘You must love the Lord your God with all your heart, all your soul, and all your mind.’^{[a] 38} This is the first and greatest commandment.³⁹ A second is equally important: ‘Love your neighbor as yourself.’^{[b] 40} The entire law and all the demands of the prophets are based on these two commandments.”