At times, portfolio management and market timing can be tiring...When necessary, here is an encouraging quote from a successful investment manager:

...' Luck plays a meaningful role in everyone's lives.', Jim Simons.

... another useful one: "It is better to be roughly right than precisely wrong", John Maynard Keynes.

...and another one, "Too large a proportion of recent "mathematical" economics are mere concoctions, as imprecise as the initial assumptions they rest on, which allow the author to lose sight of the complexities and interdependencies of the real world in a maze of pretentious and unhelpful symbols.”, Keynes.

...and when the morale is very low: "In battle, in forest, at the precipice in the mountains, on the dark great sea, in the midst of javelins and arrows, in sleep, in confusion, in the depths of shame, the good deeds a man has done before defend him", Robert Oppenheimer quoting the Bhagavat Gita.