The greatest commandment.
That commandment would be Love the Lord your God with all your heart, soul, mind, and strength. The second is like it. Love your neighbor as yourself. Here is how the love of our Father in heaven works. The first shows itself in the second. If we are loving our Father in heaven through the Son by his Spirit we will show that love in a practical meaningful way by an outward expression of helping our neighbor. If we see our neighbor hurting and do not show the Love of Christ to that person in a meaningful way we really do make ourselves to be a hypocrite. We are placed on this earth to be a vehicle of our Fathers love. We are placed here to be that person that reaches out to those around us in such a way that our Fathers love can be seen in all of our actions. Walk in the calling Father has on your life and you will see the lives of those around you changed.
Go in peace