Hey there Birthday Boy:
I guess what I have to wish you is the knowledge that you are on the right path, the faith that the actions you take are the right ones, even when they turn out to be the wrong ones.
May your curiosity take you to better and better places. May you find there the things you never knew you were looking for but you were glad you found.
May you continue to grow wiser, and may you find more reasons to laugh every day.
May people read your thoughts and be lifted, carried to new worlds. May they respond, and laugh, and cry, and think, and put a smile on your face.
May you find friendship and never be lacking for people to share your journey. And may you find the one, in her time, to laugh, and cry, and make new human beings, and grow old with.
And may the world be a better place for you having visited it. And may that visit be a good long, wealthy, healthy, joy of a ride.