Pi squared

I've found the specific level of difficulty that is inherent in certain practices that are apparently most worthwhile to give a try on a consistent basis, like

1) meditation/spiritual practice (concentration skill at a significant and useful level / consistent practice of worthwhile disciplines, like the Buddha's Eightfold Path)
2) exercise (body in significantly good athletic shape and flexibility)
3) tantra (ability to control oneself sufficiently so higher levels of ecstasy can be experienced)
4) lucid dreaming (ability to become "awake" within your dreams, for the purpose of greater self-awareness and/or creating dream realities that will improve ones waking life)
5) art/music (ability to be highly skilled with drawing/painting, musical instruments, writing, etc.)
6) activism (ability to effectively support the alternatives to the destructive status-quo paradigm, and support true democracy, justice and peace through nonviolent means)

is apparently the same. On a scale of 1-10, it's not quite a 10, but close, so I figure Pi squared has got to be it.

"All noble things are as difficult as they are rare."
- Baruch Spinoza

"In this age, which believes that there is a short cut to everything, the greatest lesson to be learned is that the most difficult way is, in the long run, the easiest."
- Henry Miller (1891-1980, American Author)

"It is not because things are difficult that we do not dare, it is because we do not dare that they are difficult."
- L.P. Sanadhya

"A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty."
- Sir Winston Churchill