There are so many things that we experience under the sun. In the absence of something very significant, they all become meaningless...
Testing? Meaningless.
Time? Meaningless.
Judgments? Meaningless.
Money? Meaningless.
Afflictions? Meaningless.
Priorities? Meaningless.
Under the sun, these things lack meaning. But there is something that isn't found under the sun that is necessary to bring meaning to everything.