In Darrin Patrick's book Church Planter: The Man, The Mission, The Message he sites Richard Baxter describing the shepherding ministry and in so doing describes the character of all disciples who are making disciples. Baxter says, "The whole of our ministry must be carried on in tender love to our people. We must let them see that nothing pleaseth us but what profiteth them; and that what doeth them good doeth us good; and that nothing troubleth us more than their hurt. We must feel toward our people, as a father toward his children; yea the tenderest love of a mother must not surpass. We must even travail in birth, till Christ be formed in them. They should see that we care for no outward thing, neither wealth, nor liberty, nor honour, nor life, in comparison of their salvation; but would even be content, with Moses, to have our names blotted out of the book of the living: rather than they should not be found in the Lamb's book of life."
This is not just hard, it is impossible! There is nothing apart from God's grace in Christ that could reorient our hearts from being thoroughtly captivated with self-interest to living outside of oneself for the good of other and for the glory God in Christ. Disciples who make disciples are in desperate need of God's reorienting grace.