'Understanding' in the Bible

and all those hearing him were astonished at his understanding and answers.

In that hour was Jesus glad in the Spirit, and said, 'I do confess to thee, Father, Lord of the heaven and of the earth, that Thou didst hide these things from wise men and understanding, and didst reveal them to babes; yes, Father, because so it became good pleasure before Thee.

And he answering said, 'Thou shalt love the Lord thy God out of all thy heart, and out of all thy soul, and out of all thy strength, and out of all thy understanding, and thy neighbour as thyself.'

Then opened he up their understanding to understand the Writings,