In this materialistic world, love of a mother for her child is considered to be supreme. I think that there are three reasons for this.
(1) Mother’s love for her child is without expectation;
(2) Mother’s pleasure or satisfaction lies in progress, pleasure or satisfaction of her child; and
(3) Mother sacrifices her happiness for the happiness of her child.
A father’s love for his child can also be considered to be supreme only if his love too satisfies aforesaid tests but, for well known reasons, father’s love, even if it satisfies aforesaid three tests, cannot be equated with mother’s love. Love of a father for his child, where it satisfies aforesaid tests, can suitably be addressed as pure or true love of a father for his child.
In my opinion, where anyone claims that his or her love for anybody is pure or true love then his or her love should pass three tests referred to above.