First, as to the meaning of the word. ‘Charity’ now means simply what used to be called ‘alms’—that is, giving to the poor. Originally it had a much wider meaning. (You can see how it got the modern sense. If a man has ‘charity’, giving to the poor is one of the most obvious things he does, and so people came to talk as if that were the whole of charity. In the same way, ‘rhyme’ is the most obvious thing about poetry, and so people come to mean by ‘poetry’ simply rhyme and nothing more.) Charity means ‘Love, in the Christian sense’. But love, in the Christian sense, does not mean an emotion. It is a state not of the feelings but of the will; that state of the will which we have naturally about ourselves, and must learn to have about other people.
C.S. Lewis, Mere Christianity, Issue 7, Page 129
A new commandment I give to you, that you love one another; as I have loved you, that you also love one another. By this all will know that you are My disciples, if you have love for one another.” John 13:34-35