Milton.
"Small service is true service while it lasts."
Wordsworth.
"Build thee more stately mansions, O my soul,
As the swift seasons roll!"
Holmes.
"When Duty whispers low 'Thou must,'
The youth replies, 'I can.'"
Emerson.
"Thou must be true thyself,
If thou the truth wouldst teach."
Bonar.
"I am content with what I have,
Little be it, or much."