Commenting on the role of self-denial, Calvin writes:

How difficult it is to perform the duty of seeking the good of our neighbor! Unless you leave off all thought of yourself and in a manner cease to be yourself, you will never accomplish it. How can you exhibit those works of charity which Paul describes unless you renounce yourself, and become wholly devoted to others? “Charity (says he, 1 Corinthians 13:4) suffereth long, and is kind; charity envieth not; charity vaunteth not itself, is not puffed up, doth not behave itself unseemly, seeketh not her own, is not easily provoked etc. Were it the only thing required of us to seek not our own, nature would not have the least power to comply: she so inclines us to love ourselves only, that she will not easily allow us carelessly to pass by ourselves and our own interests that we may watch over the interests of others, nay, spontaneously to yield our own rights and resign it to another. But Scripture, to conduct us to this, reminds us, that whatever we obtain from the Lord is granted on the condition of our employing it for the common good of the Church, and that, therefore, the legitimate use of all our gifts is a kind and liberal communication of them with others. ~ Institutes of The Christian Religion, Bk. 3, Ch. 7, para. 5.