When the Old Philosopher was shown on Square One TV, he would say "lift your head up high!" by either:

Season 3: Standing up from the stool.
Season 4: Springing up from his chair in his office.

When my brother first saw the Old Philosopher, he thought "I wonder who that man is?"

And you'll never give up! Never give up! Never give up! Never give up...!

There are only a handful of Old Philosopher Square One Sketches remaining to be shown on YT.