She was "diligent in business," but this did not preclude her being "fervent in spirit."
The frog is a diligent songster, having a good voice but no ear.
Of what is know as Elizabethean literature he has been a diligent student.
Thus shall I be diligent to serve your Wisdoms in all humility.
Diligent enquiry there, in likely and unlikely places, proved fruitless.
He afterwards put himself to a trade, was diligent, and succeeded in it.
Application and perseverance, and the diligent improvement of opportunities, will do the rest.
It matters not though a youth be slow, if he be but diligent.
Well, so he did, and was as diligent in his business as most of them could be.
All the heads were now bent over the work in diligent silence.