The repeated chanting of "they call you hero, I call you my son"
"...but the burning in your heart I did not put there".
"Continue" is a much more downbeat one, but qualifies nonetheless:
If it was up to you, and you knew that'd you'd lose... If it was up to you, I know you'd always choose to continue.
The people in Hard Man's town admire and adore him. They cheer for him when he fights, tell him to throw in the towel so he'll live when he's losing, and swear that he'll be remembered as a legend forever when he finally falls.
After spending the entirety of "History Repeating" full of nothing but anger, resentment, and blame, Proto Man finally moves on in "Melody From the Past," forgives Doctor Light, and urges Mega Man to let their creator off the hook for his mistakes as well.
"Do not blame father, he is only a man."
In the same song, when Proto Man decides to take control of his destiny:
Though my fate is broken, my path I cannot see/ Though you are the chosen, I'll make my own history.
The song "Fly on a Dog" is mostly Megaman lamenting his fate, and seemingly demanding to know why he replaced the Item system with another sentient robot sent straight into the fray like Megaman himself was. But then he begins to realize that Rush was intended not just as a tool carelessly thrown out to him, but as a partner to help see him through the fight. Both physically and emotionally.