More businesses die of indigestion than starvation.

David Packard (1912-1996) American electrical engineer, businessman, government official
(Misattributed)

The quote is frequently attributed to Packard, but actually he (anonymously) quoted in his book, The HP Way: How Bill Hewlett and I Built Our Company (1995): "Wells Fargo sent a retired engineer to visit us. I spent a full afternoon with him and I have remembered ever since some advice he gave me. He said that more businesses die of indigestion than starvation. I have observed the truth of that advice many times since then."

Variants of the saying include "entrepreneurs," "companies," and "start-ups" in place of "businesses." See here for more information.