Every mind was made for growth, for knowledge, and its nature is sinned against when it is doomed to ignorance. - William Ellery Channing

Difficulties are meant to rouse, not discourage. The human spirit is to grow strong by conflict.

I see the marks of God in the heavens and the earth, but how much more in a liberal intellect, in magnanimity, in unconquerable rectitude, in a philanthropy which forgives every wrong, and which never despairs of the cause of Christ and human virtue. I do and I must reverence human nature... I thank God that my own lot is bound up with that of the human race.

No judgment can be just or wise, but that which is built on the conviction of the paramount worth and importance of duty. This is the fundamental truth, the supreme law of reason; and the mind which does not start from this, in its inquiries into human affairs, is doomed to great, perhaps fatal error. The right is the supreme good, and includes all other goods. In seeking and adhering to it, we secure our true and only happiness. All prosperity, not founded on it, is built on sand.