“Some of the best lessons we ever learn are learned from past mistakes. The error of the past is the wisdom and success of the future.”
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“You must learn from your past mistakes, but not lean on your past successes.”

Source: Tomorrow Is Now (1963), p. xv
Context: We face the future fortified with the lessons we have learned from the past. It is today that we must create the world of the future. Spinoza, I think, pointed out that we ourselves can make experience valuable when, by imagination and reason, we turn it into foresight.

“I try to learn from the past, but I plan for the future by focusing exclusively on the present.”
Source: 1980s, Trump: The Art of the Deal (1987), p. 2

"Skylab Lessons Learned" (22 September 1975) at NASA Office of Logic Design http://klabs.org/richcontent/Misc_Content/AGC_And_History/Skylab/Skylab_Disher.htm