"...but the activity of reason, which is contemplative, seems both to be superior in serious worth and to aim at no end beyond itself, and to have its pleasure proper to itself (and this augments the activity), and the self-sufficiency, leisureliness, unweariedness (so far as this is possible for man), and all the other attributes ascribed to the supremely happy man are evidently those connected with this activity, it follows that this will be the complete happiness of man, if it be allowed a complete term of life (for none of the attributes of happiness is incomplete).
...for man, therefore, the life according to reason is best and pleasantest, since reason more than anything else is man. This life therefore is also the happiest.
...But, being a man, one will also need external prosperity; for our nature is not self-sufficient for the purpose of contemplation, but our body also must be healthy and must have food and other attention. Still, we must not think that the man who is to be happy will need many things or great things, merely because he cannot be supremely happy without external goods; for self-sufficiency and action do not involve excess, and we can do noble acts without ruling earth and sea; for even with moderate advantages one can act virtuously (this is manifest enough; for private persons are thought to do worthy acts no less than despots-indeed even more); and it is enough that we should have so much as that; for the life of the man who is active in accordance with virtue will be happy."
- Excerpt from Nicomachean Ethics, Book 10, by Aristotle
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Some 2350 years ago, 350 BC, the great philosopher Aristotle had already written down the key to human happiness. Of course he was preceded by his teachers and many philosophers before him like Plato, Socrates, etc.
But the point remains the same: The ideal life is one of contemplation and rational reflection; and then acting and carry out one's actions as a consequence of this virtuous contemplation.
How ideal it will be for me! To one day be able to live a life of quiet reflection!
The picture painted in my mind of this eventual peaceful contemplative mode of existence:
A small wooden cabin in some countryside woods close to a lake. Reading, reflecting and writing; on the life I would have lived, the things that I had seen and experienced and the passions which I had encountered.
Waking up to an hour of daily sharpening of the body, by the physical trainings I had learnt so far, from military, from athletics, gymnastics, boxing.
Then the time of the day to earn my keep, to maintain a humble living. A skill that allows me to work and create with my hands; carpentry, clothes making, shoe making and/or painting etc; for the human hands are capable of such magic and industry. And creating something useful is the closest act of God humans can emulate.
As the day winds down, a time to connect spiritually and emotionally. An hour on the piano, a few tangos danced with a loved one. As the rational mind is limited and is only one part of the beauty of the humanity; inside us lies a beauty that can only be felt emotionally and spiritually, unable to be grasped by logic, yet necessary for us to stay in touch with.
Finally the evening would end. And the night time is the best for contemplation and reflections.
The external world is filled with wonderous things for us to learn and experience. Yet the internal world of philosophy, literature and human knowledge in general, is just as vast or might be even more infinite.
The ideal life for me would be spent in reflection, contemplation, exploration, learning and understanding of this vast internal world.
Hopefully, I would had spent my youth not in vain, experiencing the external world profoundly. And calming sufficiently the wanderlust in me, to be able to live in this ideal life of quiet contemplation.
Maybe in the end, I would never be able to calm this wanderlust. Then I guess the wooden cabin would have to go... Replaced by a backpack. 
