“being a teenager these days is not for the faint of heart.”

"All for the Good: Why genetic engineering must soldier on" TIME magazine, Vol. 153, No. 1 (11 January 1999)
Context: Moving forward will not be for the faint of heart. But if the next century witnesses failure, let it be because our science is not yet up to the job, not because we don't have the courage to make less random the sometimes most unfair courses of human evolution.

Fragment 842.
Phædra

Source: Princess in Love

As quoted in Who was Ronald Reagan? (2004), by Joyce Milton, p. 85
Post-presidency (1989–2004)
Context: I know it's hard to understand, but sometimes painful things like this happen. It's all of the process of exploration and discovery. It's all part of taking a chance and expanding man's horizons. The future doesn't belong to the faint-hearted. It belongs to the brave.

Introductio ad prudentiam: Part II (1727), Gnomologia (1732)

Source: Our Band Could Be Your Life: Scenes from the American Indie Underground, 1981-1991

Source: Don Quixote de la Mancha (1605–1615), Part II (1615), Book III, Ch. 10.

Source: Magic Bleeds