'Know' in the Bible

For I want you to know how great a struggle I have on behalf of you, and those in Laodicea, and all those who have not seen my face {in person},

[because you] know that from the Lord you will receive the reward of the inheritance. Serve the Lord Christ.

Let your speech always [be] with grace, seasoned with salt, so that [you] may know how it is necessary for you to answer each one.

whom I have sent to you for this very [reason], in order that you may know {our circumstances} and he may encourage your hearts,