Jesus said,
“Love one another. As I have loved you, so you must love one another.” (Jn. 13:34)
The time frame? — none given suggesting always
The means? — as Jesus has loved us
The extent? — as Jesus has loved us
The reason? — because Jesus has loved us (1 Jn. 4:19)
Not to love is to disobey the greatest commandment. (Matt. 22:37-40)
Not to love is to deny people the reality of the greatest evidence of Christ in us. (Jn. 13:35)
Not to love is to settle for less than who we can be for love is the greatest characteristic. (1 Cor. 13:13)