'Understanding' in the Bible

Consider what I say; and the Lord give thee understanding in all things.

But they will not make further progress, for their lack of understanding will be clear to all, as theirs was also.

and how from childhood you have known the sacred writings (Hebrew Scriptures) which are able to give you the wisdom that leads to salvation through faith which is in Christ Jesus [surrendering your entire self to Him and having absolute confidence in His wisdom, power and goodness].