There is an old saying "well begun is half done"-'tis a bad one. I would use instead-Not begun at all 'til half done.

Fanatics have their dreams, wherewith they weave a paradise for a sect.

I would sooner fail than not be among the greatest.

I want a brighter word than bright

For axioms in philosophy are not axioms until they are proved upon our pulses.

Of love, that fairest joys give most unrest.

What is more gentle than a wind is summer?