How did Alexander create his own myth?

Alexander created his own myth by first asking the oracle Didnamon about his future. Today we can easily disregard this as an ancient that was never true but it all was in Alexander eyes. The oracle had told him that he would be the king of all of Asia. The next thing that happen to him was when he and his men were in the sea and it the tide had lowered. To Alexander he thought that the sea was bowing down to him and it increased his confidence. The last thing that happen to him that help created his own myth was the Gordian Knot. Legend had it that whoever untied it will be the king of Asia. Alexander did untie it by cutting the rope with his sword and later that day it was heavily raining. This meant to Alexander that the God were now with him.