The Grammar of Love

'Love is a verb, not a noun.' That was on a T-Shirt. What it stressed probably is to really love than talking about love.
However, in the Bible, just two verses apart from each other the word 'love' is used both as noun and verb. That is in 1 John 3:16-18. In the first case (in 1 John 3:16) it is a noun. 'By this we know love, that he laid down his life for us, and we ought to lay down our lives for the brothers.' The second occurrence is in 3:18, 'Little children, let us not love in word or talk but in deed and in truth.'
Love cannot be just a verb. At the same time, unless love is quantified and displayed it cannot be a verb or an action. In fact, the act of loving comes from love. The reason for the exhortation in verse 18 is the direct result of the experience of love that verse 16 talks about.
Love is quantified as 'laying down our lives for others.' That is the breadth and depth of love. It can reach a point where a person loves another person to such an extent that his life is not more important than the life of the other. The life of the loved is more important than that of the lover.
That, however, seems to be humanly impossible.
Though it seems to be impossible, it was proved to be possible by Christ Jesus. He defined love by laying down his life for us. That is love as the noun.
Now, the verb is possible only if the noun is known through our experience. That is to say, Christ's love for us must be experienced in order to love others. Experience of any other form of love is certainly inadequate.