End of 20s Start of 30s

The first day of 2019 passes and my 20s officially ends. 

The past decade was full of things. Interestingly, around half of my 20s was in Korea while another half was in MIT. 
My first half of 20s in Korea was time of endurance and internal growth. I have seen rough and dark bottom of human lives through other people's and my own tragedies. 

My later half of 20s in MIT was time of intellectual and external growth. Enjoying the unique and gifted environment of MIT, I have found myself as scientist, engineer, researcher, and inventor.
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Sometimes, I lamented that my 20s lack many good memories like travels, hanging-out with friends, love affairs, and so on, all of which I have somehow exchanged to other things. But, retrospectively, I realize that it is an illusion that there is a golden way to live a good and fruitful life. Passing my 20s, I probably learned how to be myself. My new start toward incoming 30s feels calm with simmering excitement and confidence.