From the English Methodist minister Joseph Benson, 1749-1821, here:
But it seems much more probable that the truly humble are intended, or those who are sensible of their spiritual poverty, of their ignorance and sinfulness, their guilt, depravity, and weakness, their frailty and mortality; and who, therefore, whatever their outward situation in life may be, however affluent and exalted, think meanly of themselves, and neither desire the praise of men, nor covet high things in the world, but are content with the lot God assigns them, however low and poor. These are happy, because their humility renders them teachable, submissive, resigned, patient, contented, and cheerful in all estates; and it enables them to receive prosperity or adversity, health or sickness, ease or pain, life or death, with an equal mind. Whatever is allotted them short of those everlasting burnings which they see they have merited, they consider as a grace or favour. They are happy, because theirs is the kingdom of heaven — The present, inward kingdom, righteousness, peace, and joy in the Holy Ghost, as well as the eternal kingdom, if they endure to the end. The knowledge which they have of themselves, and their humiliation of soul before God, prepare them for the reception of Christ, to dwell and reign in their hearts, and all the other blessings of the gospel; the blessings both of grace and glory. For thus saith the high and lofty One that inhabiteth eternity, whose name is Holy, I dwell in the high and holy place: with him also that is of a contrite and humble spirit, to revive the spirit of the humble, and to revive the heart of the contrite ones. Isaiah 57:15; Isaiah 66:2. And those in whom God dwells here shall dwell with him hereafter.