William Burkitt on John 15:9

Lord, what a comparison is here! As the Father hath loved me, so have I loved you: he doth not say, As the Father hath loved me, so have I loved him; but so have I loved you: nor doth he say, As God hath loved me, so have I loved you; but, As the Father! It is verbum dilectionis, a word importing dearness of affection: nor doth he say, The Father hath loved me, and I love you; but, As the Father hath loved me, so have I loved you: nor doth he say, As the Father hath loved me, so will I love you; but, So have I loved you.

This shews the priority of Christ's love, that he loved us first, and also denotes the invincible constancy of his love, and the indubitable certainty thereof: I have loved you: follow me from heaven to earth, and from earth to heaven again, and you will find that every step I have taken hath been in love.

Learn, 1. That the Lord Jesus Christ hath given full and ample demonstration of his great and wonderful love unto his church and people.

2. That it is the duty, and ought to be the singular care, of every Christian, to preserve the sweet sense and inward diffusions of Christ's love in their own souls: Continue ye in my love.