The twofold commandment of Jesus, 

from the perspective of the Apostle John in his First Epistle

The twofold commandment of Jesus:

"Jesus replied: ‘Love the Lord your God

with all your heart and with all your soul and with all your mind.’

This is the first and greatest commandment.

And the second is like it: ‘Love your neighbor as yourself.’

All the Law and the Prophets hang on these two commandments"

(Mt. 22:37-40)

• "Love the Lord your God with all your heart and with all your soul and with all your mind"

From the perspective of the Apostle John in his First Epistle,

this commandment corresponds to obeying the words in 1 John 2:15-17:

"Do not love the world or anything in the world.  If anyone loves the world,

love for the Father is not in them. For everything in the world—

the lust of the flesh, the lust of the eyes, and the pride of life—

comes not from the Father but from the world.

The world and its desires pass away, but whoever does the will of God lives forever."

Here, doing the will of God means not living according to the transient desires

of "the flesh, the lust of the eyes, and the pride of life"

but rather living in accordance with God's will.

• "Love your neighbor as yourself"

From the perspective of the Apostle John in his First Epistle,

this commandment corresponds to obeying the words in 1 John 2:3-11.

In summary, it means loving one's brother and not hating him.