'Firmly' in the Bible

and by which you are being saved, if you hold firmly to the message I preached to you -- unless you believed in vain.

To do this you must hold firmly to faith and a good conscience, which some have rejected and so have suffered shipwreck in regard to the faith.

He must hold firmly to the faithful message as it has been taught, so that he will be able to give exhortation in such healthy teaching and correct those who speak against it.

But Christ is faithful as a son over God's house. We are of his house, if in fact we hold firmly to our confidence and the hope we take pride in.