John Chrysostom

As fire requires fuel, so grace requires our prompt response, that it may be ever fervent. "I put you in remembrance that you stir up the gift of God that is in you by the putting on of my hands," that is, the grace of the Spirit, which you have received, for presiding over the church, for the working of miracles and for every service. For this grace it is in our power to kindle or extinguish. For this reason Paul elsewhere says, "Do not quench the Spirit."