In Hebrews 13:5, we are commanded to resist the love of money and to be content with what we have. And the motive immediately provided for obeying this commandment is the unconditional love of Christ towards his elect. In other words, it is foolish to give our hearts to that which can be so easily lost. Rather, let your heart be satisfied with what you cannot lose. Christ can never be lost because Christ has promised never to lose us – “I will never leave you or forsake you.”
It’s worth noting that this commandment to be content should not be interpreted as a blanket condemnation of all ambition. There is such a thing as “selfish ambition” which must be resisted by the Christian, but there is also such a thing as “righteous ambition” that seeks to glorify Christ and further benefit his people. One particular example of “righteous ambition,” not only permissible but actually commanded in Scripture, is the “righteous ambition” of diligently seeking to free yourself from slavery, in all its various forms.