The apostle did not say, "Try to create and produce love." He said, "Let us love." In other words, we are to release that love.
Some may protest and say they cannot love certain people. That is true from the natural standpoint, but we are not dealing with natural love. It is divine love, the love with which God loved us when we were unlovable and our sins had separated us from Him.
God, as to His nature, is love. And this love is shared with the believer. It has been shed abroad in the heart of each one (see Rom. 5:5).
This love of God will grow within us and flow through us in an unbroken stream if we will let it. The Christian life, which is the power of the Holy Spirit within, is a life of love. This love of God matures the Christian.
I have seen many of God's people grow older in the Lord and grow more Christlike as they walked with Him from day to day. They took more time to be with the Lord and had their hearts filled with Him. Through this, their love was perfected toward others.
This mature love expressed through God's people demonstrates to others that Christ lives in us.
"The Lord hath appeared of old unto me, saying, Yea, I have loved thee with an everlasting love: therefore with lovingkindness have I drawn thee" (Jer. 31:3).