The immortal mind, superior to his fate.
Amid the outrage of external things,
Firm as the solid base of this great world.
Rests on his own foundation. Blow, ye winds!
Ye waves! ye thunders! roll your tempests on!
Shake, ye old pillars of the marble sky!
Till at its orbs and all its worlds of fire
Be loosen'd from their seats; yet still serene,
The unconquer'd mind looks down upon the wreck;
And ever stronger as the storms advance,
Firm through the closing ruin holds his way,
When nature calls him to the destined goal. [ Akenside ]

Speech is external thought, and thought internal speech. [ Rivarol ]

Might but the sense of moral evil be as strong in me as is my delight in external beauty! [ Dr. Arnold ]

The possession of great powers no doubt carries with it a contempt for mere external show. [ James A. Garfield ]

Prudery is the innocence of the vicious - external sanctity, assumed as a cover for internal laxity. [ Chatfield ]

Talents give a man a superiority far more agreeable than that which proceeds from riches, birth, or employments, which are all external. Talents constitute our very essence. [ Rollin ]

The human mind, in proportion as it is deprived of external resources, sedulously labours to find within itself the means of happiness, learns to rely with confidence on its own exertions, and gains with greater certainty the power of being happy. [ Zimmermann ]

Be cheerful, and seek not external help, nor the tranquillity which others give. A man must stand erect, not be kept erect by others. Be like the promontory against which the waves continually break, but it stands firm and tames the fury of the water around it. [ Marcus Aurelius ]

Great men stand like solitary towers in the city of God, and secret passages running deep beneath external Nature give their thoughts intercourse with higher intelligences, which strengthens and consoles them, and of which the labourers on the surface do not even dream. [ Longfellow ]

Experience: in that all our knowledge is founded; and from that it ultimately derives itself. Our observation employed either about external or sensible objects or about the internal operations of our minds, perceived and reflected on by ourselves, is that which supplies our understandings with all the materials of thinking. [ John Locke ]