'Truly' in the Bible

"Truly I know that [it is] so, but how can a human being be just before God?

"Truly indeed you [are the] people, and wisdom will die with you.

And what is more, [if] I have truly erred, my error remains with me.

"Truly, it [is] a spirit in a human being, and the breath of Shaddai teaches them.

What's more, God truly does not act wickedly, and Shaddai does not pervert justice.

for truly my words [are] not falsehood; [one who has] perfect knowledge [is] with you.