Ibn Ezra: This is like A'azin (I will hearken).

Malbim: These are necessary to weigh another's words and examine his opinion. (a) He hears the ideas and consequences that intellect derives. (b) He rises to the premises and roots that produce the results. (c) He hears all his words from the beginning to the end. I did so - I was silent, and heard your words from the beginning to the end. I bent my ear to understand your premises and roots. I waited until you explained all your investigations and all the details that result from them.