Usually, Link would never enter a portal without being clear with the situation. But now, strong curiosity had accumulated in his heart. He really wanted to know what was behind the door.
Further, he'd seen the other display extremely high-level skills along the way. Some even surpassed his understanding. If the other wanted to hurt him, it would be easy. None of this was needed.
After seconds of hesitation, Link chose to fly through the Gates of the True Self.
Strangely enough, the moment he made the choice, the other two portals disappeared. The Gates of the True Self took up his entire vision and was immediately before him.
Link had no more hesitation; he dived in.
The sight changed before him. After a while, the light around him became gentle. Link discovered that his dragon form was gone, and he'd returned to human form.