Undespondingly

I try to reach, grow weary with the effort, pause, rest, and try again, and this state of things I conceive must continue yielding me luxurious delight until I sink fearlessly and undespondingly into the unknown rest; […]

Source: wiktionary

Well, it is as it is, and must be borne. It shall be borne undespondingly, though not without grief.

Source: wiktionary

This must needs be in all experiences of life;—I am only thankful that it is not my nature to anticipate the “shady side” while it is my fortunate capability to look upon it undespondingly when it presents itself.

Source: wiktionary

[W]e need […] men who can school themselves into the religion of patience and possess the ability which enables us, under all possible circumstances, when we have done our best, to rest undespondingly and trustfully for the result.

Source: wiktionary