Faced with an opaque future the only way to find which door contains the hidden prize is to have a hand in all of them. It's why dandelions scatter in the wind. Being too narrow or rigid in specialization, focus or growth leads to disastrous results.
In the Sierra Nevada mountains this last summer, I was taking a shuttle down to some of the more secluded parts of the park when I noticed there were thousands of large logs and stumps hulking along on each side of the serpentine road. The bus driver said something that instantly made me think of Nassim Taleb and black swan events. In Nov 2011 there had been a terrible wind storm called appropriately The Devils Windstorm. In the Sierras where wild weather is abundant strong winds occur quite regularly. However he said that this particular storm carried winds of 180 mph and came from the eastern direction sweeping westward. Now it wasn't just the wind alone that knocked these huge trees over, uprooting them and flattening large swaths of the forest, it was the fact that the wind came from the direction of the east that did the most damage. You see the typical wind, year in and year out, comes from the west and the trees had braced and built themselves up for years against the western wind. Indeed, the very trees that braced themselves the best from the western wind had grown the tallest and the fastest. Then on that one fateful night five years ago the raging wind was able to knock down trees hundreds of years old. In all it leveled 1/4 of the trees in the valley, and the rangers had to pass a bill through congress in able to get logging equipment to cut down the felled trees (no logging allowed in national forests - its protected land).
Similarly the 2008-09 financial crisis found many facing a wind from another direction. The majority of people had been long into stocks and real estate and they now found themselves facing a danger that they hadn't accounted for beforehand and they were too concentrated in a single area. This is why optionality is so important. It allows you to know in advance that you don't know anything, and rest comfortably. Convex optionality allows you to pick exactly what your cost will be - you just can't pick your benefit. If you are sufficiently diversified with convex options then the wind can blow in any direction and -over time - you will thrive.
This is why in my portfolio, I own every color of the rainbow. Not just in the financial market, but also in the real market - life. The trick is to own something that zigs while the others zag. Don't just be healthy, be intelligent. Don't just have money saved, be generous and give gifts. Don't just read - write as well. Use all the convex options at your disposal. You can't know in advance which ones will payoff - but you know that some of them will and they will more than pay for all all the options. Personally I take great joy knowing that everyday I'll have to throw my all against the tree of life and see what shakes loose. I like the struggle and I relish the fact that it is difficult. It's not supposed to be easy. Growth can only come from overcoming. Plants that are grown in a no wind environment are weak and limp while ones fighting against the elements day after day are robust and strong. We are the same.