'Strong' in the Bible

"I am going the way of all the earth. You be strong therefore, and show yourself a man;

He said, "Go out, and stand on the mountain before Yahweh." Behold, Yahweh passed by, and a great and strong wind tore the mountains, and broke in pieces the rocks before Yahweh; but Yahweh was not in the wind. After the wind an earthquake; but Yahweh was not in the earthquake.