There is no hope unmingled with fear, and no fear unmingled with hope.

"There is no hope unmingled with fear, and no fear  unmingled with hope." - Baruch Spinoza

Limits, like fear, is often an illusion.

"Limits, like fear, is often an illusion." - Michael Jordon

Fear cannot be without hope nor hope without fear.

"Fear cannot be without hope nor hope without fear." - Baruch Spinoza

Realist do not fear the results of their study.

"Realist do not fear the results of their study." - Fyodor Dostoevsky