That is why I would remind you to stir up (rekindle the embers of, fan the flame of, and keep burning) the [gracious] gift of God, [the inner fire] that is in you by means of the laying on of my hands [with those of the elders at your ordination]. For God did not give us a spirit of timidity ... but [He has given us a spirit] of power and of love and of calm and well-balanced mind and discipline and self-control. (2 Timothy 1:6, 7 AMP)
A fire has to be tended to or it will fade and the room will be cold or the camp dark. This inner fire of Timothy's was needing some attention. He had a passion and love for Jesus in him, a fire, that was given to him when Paul and the elders placed their hands on his head and prayed. Now he was becoming cool, maybe losing his first love.
His fire was being quenched by a bit of fear, a little timidness of testifying of the One he loved, his Savior. He was also timid of speaking of his best friend Paul because he was in prison quite a bit. So Paul told him not to be ashamed because God had placed in Timothy power, love and a calm mind. Timothy had resources for keeping his flame alive. They were power from above, love that keeps a mind on others' hurts and a calm mind coming from the peace that only Jesus gives.
This gift is a gift of grace. We don't earn it. If we did we'd be proud and make much of us. But it's poured into us from the hand of God so we make much of our Savior, enjoy Him and live with a warm heart, a fire within and and a love to give His heart away.