'Enthusiasm' in the Bible

For I testify about them that they have a certain enthusiasm for God, but not in accordance with [correct and vital] knowledge [about Him and His purposes].

For Titus not only accepted our appeal, but was so very interested in you that he has gone to visit you of his own accord.

for I know your eagerness [to promote this cause], and I have [proudly] boasted to the people of Macedonia about it, telling them that Achaia has been prepared since last year [for this contribution], and your enthusiasm has inspired the majority of them [to respond].

So then, my dear ones, just as you have always obeyed [my instructions with enthusiasm], not only in my presence, but now much more in my absence, continue to work out your salvation [that is, cultivate it, bring it to full effect, actively pursue spiritual maturity] with awe-inspired fear and trembling [using serious caution and critical self-evaluation to avoid anything that might offend God or discredit the name of Christ].