In 1 Corinthians 13:2, Paul says that if we have faith to move mountains but have not love, we are nothing. The reason we are nothing is because the whole purpose of our faith, is to express God through us, and God is Love.
Jesus said that people will recognize that we are Christians, by our love. Why he did not say they will recognize us by our faith? Because God is Love.
In eternity Love remains forever, and all heaven is about love. There is no faith in heaven because nobody needs faith in heaven. Faith is needed here only on earth. Who needs faith in heaven? But everyone in heaven needs love. In fact we can not be in heaven and can not function in heaven in whatever aspect, if we do not have love. Why? Because the only place where there is no love and no love is needed, is hell. Everywhere else, it is.
The very purpose of existence is to love God and to love people.