Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.

Keep fighting until the last buzzer sounds.

Belief in an external world independent of the perceiving subject is the basis of all natural science.

The most beautiful emotion we can experience is the mystical. It is the power of all true art and science. He to whom this emotion is a stranger, who can no longer wonder and stand rapt in awe, is as good as dead. To know that what is impenetrable to us really exists, manifesting itself as the highest wisdom and the most radiant beauty, which our dull faculties can comprehend only in their most primitive forms - this knowledge, this feeling, is at the center of true religiousness. In this sense, and in this sense only, I belong to the rank of devoutly religious men.

Physical concepts are free creations of the human mind, and are not, however it may seem, uniquely determined by the external world.

To the extent math refers to reality, we are not certain to the extent we are certain, math does not refer to reality.

The value of achievement lies in the achieving.