The best gift you can ever give your mentor is to grow. They feed off your growth. I believe that everyone has the seed of success inside, but too many people can't find it in themselves and as a result do not reach their potential. But there are those whose purpose in life is to fertilize the seed of potential in another, who are rewarded by seeing that person grow and blossom before their eyes. Raising up others to a higher level is a mentor's joy and sustenance.