'Established' in the Bible

For to which of the angels did the Father ever say,“You are My Son,Today I have begotten (fathered) You [established You as a Son, with kingly dignity]”?And again [did He ever say to the angels],“I shall be a Father to HimAnd He shall be a Son to Me”?

[and besides this evidence] God also testifying with them [confirming the message of salvation], both by signs and wonders and by various miracles [carried out by Jesus and the apostles] and by [granting to believers the] gifts of the Holy Spirit according to His own will.

For where there is a will and testament involved, the death of the one who made it must be established,

Do not be carried away by diverse and strange teachings; for it is good for the heart to be established and strengthened by grace and not by foods [rules of diet and ritualistic meals], which bring no benefit or spiritual growth to those who observe them.