"Certain humility" refers to having a humble attitude or demeanor that is characterized by confidence and self-assurance in specific areas or aspects of one's life or abilities. Full definition
Sometimes the work isn't so glorious (shoveling shit) or fun (feeding steers at -40 degrees) or interesting (picking rocks), but this develops a certain humility. (canadianbusiness.com)
But we needn't infer anything, because Jesus himself commands us to live out a certain humility in our lives when He says, «When you pray, do not be like the hypocrites, who love to stand and pray in the synagogues and on street corners so that others may see them.» (firstthings.com)
Like the Church in Jerusalem listening to Paul and Barnabas, we must listen with a certain humility to what God has done. (firstthings.com)