We can encourage the disposition of looking at the brightest side of things, instead of the darkest.

And while we see the cloud, let us not shut our eyes to the silver lining.
The beam in the eye sheds brightness, beauty, and joy upon life in all its phases.

It shines upon coldness, and warms it; upon suffering, and comforts it; upon ignorance, and enlightens it; upon sorrow, and cheers it.

The beam in the eye gives lustre to intellect, and brightens beauty itself.

Without it the sunshine of life is not felt, flowers bloom in vain, the marvels of heaven and earth are not seen or acknowledged, and creation is but a dreary, lifeless, soulless blank.
While cheerfulness of disposition is a great source of enjoyment in life, it is also a great safeguard of character.