Music arranger Irwin Kostal used the theme from this song as the leitmotif of George Banks, as it most expresses the way he "marches" through life.
The song is first sung as George Banks (played by David Tomlinson) marches through the front door of his home, on "[his] return from daily strife to hearth and wife".
[1] The song is reprised several times throughout the film, with Julie Andrews also singing a verse.
The final reprise is sung when Banks thinks he has lost everything.
At 6:01, I march through my door, My slippers, sherry and pipe are due at 6:02, Consistent is the life I lead...