Pain Assault

During his fight with Pain, Naruto is nearly tempted by the Nine-Tails to remove its seal. This activates the safeguard Minato placed on the seal, causing his imprint to appear within Naruto's subconscious and stop him. Minato says that he isn't happy to see the Nine-Tails again, but that at the same time admits that its actions have allowed him to see his son. Naruto picks up on this and, having never known his parents' identities, is overjoyed to meet his father. The Nine-Tails keeps threatening to kill Minato while they talk, so he and Naruto relocate.

Minato placing his trust in Naruto.

Naruto is angry that his own father would seal the Nine-Tails within him and punches Minato out of frustration, which he understands and apologises to Naruto for. He quickly gets over it, noting that, as the son of the Fourth Hokage, he can handle it. Minato's time with Naruto is limited so he does a quick run down of the things he has already observed through Naruto: that Pain has destroyed Konoha and killed Jiraiya. Despite what he's done, Minato suggests that Pain is only a symptom of the shinobi system and that he's being taken advantage of by Tobi. Naruto is overwhelmed, unsure if he can forgive Pain or do anything to stop the cycle of hatred that produced him, but Minato responds that he has faith in Naruto. He restores the Nine-Tails' seal before disappearing.

Power

In the anime, when Naruto nearly loses control after his clone absorbs the Nine-Tails' chakra, Minato appears before him again to restore the seal. Once again, Minato voices his confidence in his son and his ability to overcome any adversity.