John 13v34 “A new command I give you: Love one another. As I have loved you, so you must love one another. 35 By this everyone will know that you are my disciples, if you love one another.”
Jesus says this after serving and washing the feet of His disciples. Showing that serving one another is the foundation of love. The most famous man in all the world was a loving servant and he makes it a point to tell us to be the same way so that the world will know we are of Him and not of this world.
Our first reaction to anything should always be of love.