'Zealous' in the Bible

Wherefore also we are zealous, whether present or absent, to be agreeable to him.

And we have sent with them our brother whom we have often proved to be of diligent zeal in many things, and now more diligently zealous through the great confidence he has as to you.

for I am zealous for you with zeal of God, for I did betroth you to one husband, a pure virgin, to present to Christ,