Srila Prabhupada said:

Similarly, when you remain fully surrendered to the supreme will, either in distress or in happiness, that is your happiness. That is real happiness. This condition cannot be without love. In any condition, you remain surrendered. It cannot be done without love. When there is lack of love, this kind of mentality cannot develop: "In any condition I shall remain surrendered." Just like, you are…you are…A whole society is carrying my order, not because I am superior person. There is love. Without love, you cannot do so. You have got some bit of love for me, therefore you carry my order. Otherwise it is not possible. And I cannot also. You are foreigners, you are Americans; I came from another country, I have no [bank] account. I cannot also order you: "You must do it, otherwise I will chastise you." Because there is love. It is a connection of love. I can also become bold enough to chastise you, but you also, in whatever condition you carry my order due to the basic principle is love. And our whole philosophy is love. We are just trying to learn how to love Krsna, that's all. So without the basic principle of love, these things cannot be conceived.

Discussion on Arthur Schopenhauer