Diving into the letters John D. Rockefeller wrote to his son.
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Sources:
The 38 Letters From J.D. Rockefeller to his son
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4:30 - Your destiny is determined by your actions
10:00 - Self-control and discipline
11:25 - Planning luck is planning life
13:34 - Work as a key to happiness
16:15 - Does it keep you up at night
17:35 - Don't be a passive person
20:00 - Mortgage for the future
21:25 - On failure
25:05 - Belief is necessary
31:17 - Excuses are the source of failure
32:55 - Attitude determines achievements
34:10 - Greed is necessary
36:50 - Keys to wealth
41:45 - The importance of self-reflection
46:35 - Two types of people to avoid
49:50 - The peace of conscience is the only reliable reward.