Being a Whovian and hearing tid-bits of philosophical musings in the character dialogue is a delight.
“Go left” references carving the adventurous path versus the safe, mundane, and predictable. I’ve taken a left as of late and seeing whom is along and whom is not along brings the yin and yang of my choice. Great adventures lie in front of me and I’ve not a fearful bone. Curious bone, absolutely.
When the world screams to go right into the safe, mundane, and predictable nature of things you can’t complain. You chose it – knuckles down, mates.
Go left. Seek the adventure, find the unknown, and for love of humanity get out there and discover life. I’d prefer being on my death bed with zero regrets than ask “what if?”